{"title":"BMW G81 M3 Competition","description":"","products":[{"product_id":"akrapovic-slip-on-line-titanium-for-bmw-m3-m4-g80-g81-g82-g83","title":"Akrapovic Slip-On Line (Titanium) for BMW M3 \/ M4 (G80, G81, G82, G83)","description":"\u003cdiv style=\"line-height:1.5;\"\u003e\n\u003cp\u003eThis \u003cstrong\u003ehigh-grade lightweight titanium system\u003c\/strong\u003e, finished with\u003cstrong\u003e hand-crafted carbon-fibre tailpipes\u003c\/strong\u003e, weighs in at \u003cstrong\u003e35% lighter\u003c\/strong\u003e than stock and features a pair of \u003cstrong\u003ecollectors cast in the in-house foundry\u003c\/strong\u003e. The Slip-On Line (Titanium) comes with a specially developed \u003cstrong\u003eAkrapovic control kit\u003c\/strong\u003e for a complete sound experience. The sound character offers a rich tone at normal cruising, rising to a deep sporty sound when the M3\/M4 is driven more dynamically. It serves up a \u003cstrong\u003eperfect sound at all rpms\u003c\/strong\u003e, delivering comfort and sportiness in one exhaust. A ground-breaking octagonal shape has been fashioned from lightweight titanium with a carbon-fibre outer sleeve for the tailpipes, and for more traditional buyers there is the classic cylindrical design.\u003c\/p\u003e\n\u003cp\u003eThe system delivers \u003cstrong\u003epower increases\u003c\/strong\u003e of 8.0 kW (10.9 hp) at 6,000 rpm and a \u003cstrong\u003etorque gain\u003c\/strong\u003e of 13.9 Nm at 5,000 rpm when tested on the Akrapovic dyno against a BMW M4 Competition with a standard stock exhaust. Remapping is not needed for this configuration, and it fits all vehicles (OPF and non-OPF), but the ECE certificate is valid only for cars equipped with an OPF filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptional link pipes and downpipes are available\u003c\/strong\u003e for customers looking to change the exhaust for closed circuit usage. An optional \u003cstrong\u003eAkrapovic Sound Kit\u003c\/strong\u003e is also available. With the installation of the optional link pipes, downpipes, and Akrapovic Sound Kit, ECE type approval of the Slip-On Line (Titanium) is no longer valid. An optional hand-crafted carbon-fibre rear diffuser is also available to add an extra visual impact to the Akrapovic tailpipes.\u003c\/p\u003e\n\u003cp\u003eThe exhaust system also fits on \u003cstrong\u003exDrive, CSL, ?LCI?\u003c\/strong\u003e\u003cstrong\u003e, M3 Touring (G81), M4 (G83) Competition and Convertible models\u003c\/strong\u003e. The ECE type-approval certificate is not valid for CSL model.\u003c\/p\u003e\n\u003cp\u003eThe Slip-On Line (Titanium) exhaust system is ECE type approved for cars equipped with an Otto\/gasoline particulate filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Tail Pipe Set (Carbon) has to be ordered separately as a mandatory part. Please choose TP-CT\/69 or TP-CT\/68 or TP-CT\/73\/CF.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv style=\"margin-top:15px; margin-bottom:10px;\"\u003e\n\u003ch4 style=\"font-size:18px; margin-bottom:10px;\"\u003eTechnical Data:\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"text-align: right;\"\u003e\n      \u003cth\u003eUnit\u003c\/th\u003e\n      \u003cth\u003eStock\u003c\/th\u003e\n      \u003cth\u003eAkrapovic\u003c\/th\u003e\n      \u003cth\u003eMax gain\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ekW\u003c\/td\u003e\n      \u003ctd\u003e376.0 \/ 6200 rpm\u003c\/td\u003e\n      \u003ctd\u003e382.0 \/ 6200 rpm\u003c\/td\u003e\n      \u003ctd\u003e+ 8.0 \/ 6000 rpm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHP (m)\u003c\/td\u003e\n      \u003ctd\u003e511.2 \/ 6200 rpm\u003c\/td\u003e\n      \u003ctd\u003e519.4 \/ 6200 rpm\u003c\/td\u003e\n      \u003ctd\u003e+ 10.9 \/ 6000 rpm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHP (i)\u003c\/td\u003e\n      \u003ctd\u003e504.2 \/ 6200 rpm\u003c\/td\u003e\n      \u003ctd\u003e512.3 \/ 6200 rpm\u003c\/td\u003e\n      \u003ctd\u003e+ 10.7 \/ 6000 rpm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNm\u003c\/td\u003e\n      \u003ctd\u003e650.2 \/ 4350 rpm\u003c\/td\u003e\n      \u003ctd\u003e660.8 \/ 4450 rpm\u003c\/td\u003e\n      \u003ctd\u003e+ 13.9 \/ 5000 rpm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003elb-ft\u003c\/td\u003e\n      \u003ctd\u003e479.6 \/ 4350 rpm\u003c\/td\u003e\n      \u003ctd\u003e487.4 \/ 4450 rpm\u003c\/td\u003e\n      \u003ctd\u003e+ 10.3 \/ 5000 rpm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ekg\u003c\/td\u003e\n      \u003ctd\u003e23.5\u003c\/td\u003e\n      \u003ctd\u003e15.3\u003c\/td\u003e\n      \u003ctd\u003e- 8.3\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003elb\u003c\/td\u003e\n      \u003ctd\u003e51.9\u003c\/td\u003e\n      \u003ctd\u003e33.7\u003c\/td\u003e\n      \u003ctd\u003e- 18.2\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e%\u003c\/td\u003e\n      \u003ctd\u003e\u003c\/td\u003e\n      \u003ctd\u003e\u003c\/td\u003e\n      \u003ctd\u003e- 35.0\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003emin\u003c\/td\u003e\n      \u003ctd\u003e\u003c\/td\u003e\n      \u003ctd\u003e240\u003c\/td\u003e\n      \u003ctd\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Akrapovic","offers":[{"title":"Default Title","offer_id":43686900138063,"sku":null,"price":12829.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/4383\/8543\/files\/Akrapovic-BMW-G8X-CSL.alt_2_ab35ce06-a042-439c-a59c-c386c8352ed2.png?v=1760963319"},{"product_id":"akrapovic-fitting-kit-for-bmw-m3-m4-g80-g81","title":"Akrapovic Fitting kit for BMW M3 \/ M4 (G80, G81)","description":"\u003cdiv style=\"line-height:1.5;\"\u003e\n\u003cp\u003eFitment notice:\u003c\/p\u003e\n\u003cp\u003eMandatory fitting kit, used for mounting the Rear Wing (Carbon) to BMW M3 (G80) and M340I (G20).\u003c\/p\u003e\n\u003cp\u003eThe product also fits on M3 LCI versions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Akrapovic","offers":[{"title":"Default Title","offer_id":43686900760655,"sku":null,"price":849.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/4383\/8543\/files\/04f449c6-5c52-4b7a-8a18-a81aeff4278a_801253af-656f-4626-bb39-f65e290c954a.png?v=1760963353"},{"product_id":"handr-sway-bar-for-bmw-m3-type-g80","title":"H\u0026R Sway Bar Kit - BMW M3 Type G81 (Wagon xDrive)","description":"\u003ch1\u003eH\u0026amp;R Sway Bar Kit\u003c\/h1\u003e\u003cp\u003e\u003cstrong\u003eFlatter cornering, less body roll\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eH\u0026amp;R Sway Bar Kit tie the BMW M3 down through corners and cut body roll without touching ride quality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey features\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e✓ Reduces body roll through corners\u003cbr\u003e✓ Adjustable rate on most applications\u003cbr\u003e✓ Front and rear bars supplied as a kit\u003cbr\u003e✓ Direct fit to the factory mounting points\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBMW M3 (G81) Wagon CS, 2025 onward\u003cbr\u003eBMW M3 (G81) Wagon Competition xDrive, 2022 onward\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e✓ H\u0026amp;R Sway Bar Kit\u003cbr\u003e✓ Fitting instructions\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProfessional fitting is recommended.\u003c\/em\u003e\u003c\/p\u003e","brand":"H\u0026R Suspension","offers":[{"title":"Default Title","offer_id":45855538839631,"sku":"WC33616-4","price":1419.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/4383\/8543\/files\/Stabi_einzeln-1-scaled_90e2def0-a59c-43c6-9c44-218e8d8ef064.jpg?v=1781680165"},{"product_id":"handr-sport-springs-for-bmw-m3-type-g80","title":"H\u0026R VSS Height Adjustable Springs - BMW M3 Type G81 (Wagon xDrive)","description":"\u003ch1\u003eH\u0026amp;R VSS Height Adjustable Springs\u003c\/h1\u003e\u003cp\u003e\u003cstrong\u003eSet your own ride height, keep the factory dampers\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eH\u0026amp;R VSS Height Adjustable Springs let you dial the ride height on the BMW M3 across an adjustable range, rather than accepting one fixed drop. The factory dampers stay in place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey features\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e✓ Height adjustable across a set range\u003cbr\u003e✓ Choose your own drop rather than a fixed height\u003cbr\u003e✓ Keeps the factory dampers and any electronic damper control\u003cbr\u003e✓ Hardened and tempered spring steel\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBMW M3 (G81) Wagon CS, 2025 onward\u003cbr\u003eBMW M3 (G81) Wagon Competition xDrive, 2022 onward\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e✓ H\u0026amp;R VSS Height Adjustable Springs\u003cbr\u003e✓ Fitting instructions\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProfessional fitting and a wheel alignment are recommended after installation.\u003c\/em\u003e\u003c\/p\u003e","brand":"H\u0026R Suspension","offers":[{"title":"Default Title","offer_id":45855538872399,"sku":"WC23026-2","price":2035.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/4383\/8543\/files\/x-HR-Gewindefedern-Stdandardbilder-5-Hinweistext-scaled_f249a15b-52cd-4e20-b91d-249f73454855.jpg?v=1781680168"},{"product_id":"handr-sport-springs-for-bmw-m3-type-g80-1","title":"H\u0026R Sport Springs - BMW M3 Type G81 (Wagon xDrive)","description":"\u003ch1\u003eH\u0026amp;R Sport Springs\u003c\/h1\u003e\u003cp\u003e\u003cstrong\u003eLowered stance, sharper handling\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eH\u0026amp;R Sport Springs lower the BMW M3 to close up the wheel-to-guard gap and cut body roll. The progressive rate keeps the ride composed on the road while firming up under load.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey features\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e✓ Lowers ride height for a tighter stance\u003cbr\u003e✓ Progressive spring rate for balanced handling and comfort\u003cbr\u003e✓ Hardened and tempered spring steel\u003cbr\u003e✓ Works with the factory dampers\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBMW M3 (G81) Wagon CS, 2025 onward\u003cbr\u003eBMW M3 (G81) Wagon Competition xDrive, 2022 onward\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e✓ H\u0026amp;R Sport Springs\u003cbr\u003e✓ Fitting instructions\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProfessional fitting and a wheel alignment are recommended after installation.\u003c\/em\u003e\u003c\/p\u003e","brand":"H\u0026R Suspension","offers":[{"title":"Default Title","offer_id":45855538905167,"sku":"28616-6","price":935.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/4383\/8543\/files\/handrspringsa_1_1_1_1_1_1_1_1_55e0f337-ebce-4521-9f56-9092518ae42d.jpg?v=1781680168"},{"product_id":"eventuri-bmw-g8x-m3-m4-intake-system-eve-g8xmv2-cfx-int","title":"Eventuri BMW G8X M3\/M4 Intake System - BMW M3 (G80), BMW M3 (G81), BMW M4 (G82)","description":"\u003ch1\u003eEventuri BMW G8X M3\/M4 Intake System\u003c\/h1\u003e\u003cp\u003e\u003cstrong\u003eThe Eventuri Difference\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIntroducing our revised G8X M3\/M4 intake for fitment with the CSL Strut brace. We have carried out intensive R\u0026amp;D to develop an intake which not only improves on the stock M3\/M4 but also is future proof in its capacity to cater for high powered builds well in excess of 1000hp. Our system is a complete redesign from the airboxes to the turbo inlets with the aim of reducing pressure loss while increasing the flow rate and keeping inlet temperatures low. We have maximised the usage of the available space to employ 2 custom made filters with a 40% larger filtration area than stock. These are used in our Patented Venturi housings to smoothly funnel the air to the turbo inlets. The inlets themselves are up to 160% larger in cross sectional area than stock and are designed with an advanced dimpled inner surface to reduce frictional losses between the flow and the wall boundary. By allowing a \"cushion\" of air at the wall surface, airflow is able to move through the inlets at higher flow rates with reduced pressure loss. This allows the turbos to draw air with less resistance and therefore reduce the wastegate duty cycle resulting in higher overall performance.\u003c\/p\u003e\u003cp\u003eThe G8X M3\/M4 Eventuri system uses our Patented Carbon Fiber Housings with our Gen 2 bespoke filters, which provide an aerodynamically efficient airflow path from the filter to the turbos. Not just another cone filter with a heat shield but a unique design which invokes the Venturi effect and maintains laminar flow conditions to reduce the drag on the turbo.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePerformance:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDyno Testing\u003c\/p\u003e\u003cp\u003eThis intake has been independently dyno tested by BR Performance in Belgium. Tests were done back to back against the stock airbox and several runs were taken with each configuration. The car tested was without charcoal filters. We took the best results from the stock airbox and the best from the Eventuri system. The dyno results show a consistent gain throughout the RPM range which can be attributed to the turbos reaching peak boost earlier and with a lower wastegate duty cycle due to the higher efficiency of the intake system. This gain is despite the dyno cell temperatures rising from 11.8 deg C for the stock system tests to almost 16 deg C for the Eventuri tests. The performance gain translates on the road to increased part throttle and full throttle response with the car pulling much more eagerly to the redline.\u003c\/p\u003e\u003cp\u003eIAT Testing\u003c\/p\u003e\u003cp\u003eTurbo charged cars can build up a lot of engine bay heat which can be detrimental to performance if the intake system is not sealed against it. Even with intercoolers and charge coolers, it is important to minimise Inlet Air Temperatures (IATs) as these cooling devices work with an efficiency ratio so the output air temperature is affected by the input air temperature. Derestricting the intake by using open cones, even if heat shielded will inevitably pull in hot air from the engine bay. Our system being fully sealed solves this problem while still derestricting the flow path using bigger volumes. To demonstrate, we data logged air temperatures using thermocouples just before each turbo. Comparisons were taken between stock and Eventuri on the same day with the same ambient conditions. Our M3 was allowed to heat soak and then it was accelerated from 30mph to 90mph in 6th gear to measure the change in temperature across each run. At 90mph, throttle was released and brakes were applied to 30mph at which point the car accelerated again to 90mph. A total of 3 pulls were made with both intake configurations.\u003c\/p\u003e\u003cp\u003eThe first graph shows the temperatures on before both turbos with the stock airbox on the left and the Eventuri intake on the right. Due to scaling, the axes are not perfectly matched between both graphs but the numbers can be clearly seen. As expected, the RHS of the intake showed similar data between stock and Eventuri since the flow path and materials are similar. However, the LHS intake shows a significant improvement in IAT for the Eventuri. This can be seen in the second graph where the 2 charts are overlaid. On each successive pull the Eventuri shows a lower IAT as compared to stock and also the spike in temperature as throttle is lifted is significantly lower with the Eventuri. This difference is down to the more direct flow path with the Eventuri and also the materials used in the turbo inlet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProduct details:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003ePart Numbers:\u003c\/p\u003e\u003cp\u003e✓ EVE-G8XMV2-CF-INT : BMW G80 M3, G82 M4 Carbon Intake System - Gloss Finish\u003cbr\u003e✓ EVE-G8XMV2-CFM-INT : BMW G80 M3, G82 M4 Carbon Intake System - Matte Finish\u003c\/p\u003e\u003cp\u003eThe Eventuri G8X M3\/M4 intake system consists of a number of components engineered to perform a specific purpose and fabricated to the highest of standards. We use 100% pre-preg carbon fiber with no fibreglass which means we can achieve a smooth internal surface to maintain smoother airflow. Here are the details for each component and the design ethos behind them:\u003c\/p\u003e\u003cp\u003eEach intake system consists of:\u003c\/p\u003e\u003cp\u003e✓ 2 x Carbon Fiber Patented Venturi Filter Housings\u003cbr\u003e✓ 2 x Bespoke High Flow Dry Cone Filters\u003cbr\u003e✓ 2 x Carbon Fiber Inlet Ducts\u003cbr\u003e✓ Carbon Fiber Intake Tube\u003cbr\u003e✓ 2 Thermoplastic Turbo Inlets\u003cbr\u003e✓ Laser Cut Stainless Steel Brackets\u003cbr\u003e✓ Custom Flexible Hose\u003cbr\u003e✓ CNC Machined Bracket Mounts and Reinforcement Rings\u003c\/p\u003e\u003cp\u003eFILTER HOUSING ASSEMBLIES\u003c\/p\u003e\u003cp\u003eThe filter housings comprise of our bespoke generation 2 filters, aluminium inlet cowls and stainless steel brackets. The carbon pod shrouds the reverse mounted filter and smoothly shapes the airflow down to the tube section which then connects to the turbo tubes. This changes the flow path from the OEM airbox where airflow enters the front of the airbox, changes direction by 90 degrees to travel through the panel filter and then changes direction again by 90 degrees to move through the tube section. Our system is a lot more direct with airflow entering the front of the filter housing and and moving into the tube section without any abrupt direction changes. The result is a smoother path from the filter to the turbo inlet tube and therefore the turbo is able to function with less drag.\u003c\/p\u003e\u003cp\u003eBESPOKE CONE FILTER\u003c\/p\u003e\u003cp\u003eIn order to achieve the highest flow rate possible we designed a new filter element to make as much use of the space available in the engine bay as possible. This new filter has an outside diameter of 192mm or 7.6\" and when flow tested with a housing using a 4\" opening is able to flow up to 900 CFM at 28\" H2O. The filter medium is ISO tested to ensure that filtration is in line with OEM standards and is also dry. The filter is constructed with our signature flow cones to aid in the Venturi housing principle.\u003c\/p\u003e\u003cp\u003ePATENTED TECHNOLOGY\u003c\/p\u003e\u003cp\u003eOur patented filter housing has a smooth reduction in cross sectional area as it shrouds the filter and tapers down to the tubing. This geometry invokes the Venturi effect where the airflow accelerates whilst maintaining laminar conditions. It can be thought of as a large velocity stack - below is a diagram to show the comparison between our patented design and a regular intake system. Our bespoke filters aid the airflow moving through the housings and allow for an even velocity profile as the airflow exits the housings. Further details can be read in the Technology and Filters pages.\u003c\/p\u003e\u003cp\u003eTURBO INLETS\u003c\/p\u003e\u003cp\u003eThe biggest restriction in the stock system are the turbo inlets. The G8X M3\/M4 has an inlet for each turbo and we were able to significantly increase the sizes of both of them. By increasing their sizes, the turbos are able to pull in air with less restriction hence allowing for a quicker spool. In the following photos you can see the differences in the sizes. Although the benefit may be small for a stock car, we expect these larger inlets to be more beneficial for higher states of tune where the target boost pressures are increased.\u003c\/p\u003e\u003cp\u003eWe could have finalised the designs here however, we wanted to push the boundaries further and introduce a novel dimpled pattern to the inside surfaces. In theory, small dimples can increase the flow rate by reducing the frictional pressure losses through a tube. We have explained this in detail in our video which can be found in the Video Tab\u003c\/p\u003e\u003cp\u003eHERE\u003c\/p\u003e\u003cp\u003e.\u003c\/p\u003e\u003cp\u003eA lot of R\u0026amp;D went into simulating different sizes and shapes until we settled on an optimised version which demonstrated a higher flow rate through the inlets in comparison with a smooth surface. Applying such an intricate was only possible due to the advanced manufacturing technique we employed to make the inlets, where traditional methods would not have given the accuracy required. The dimples create an \"air cushion\" affect over the surface of the inlet which then allows the main body of air to \"slip\" with less friction through the body into the turbo. This results in a more even velocity profile in a dimpled tube with the net affect being a higher velocity for the same boundary conditions. Here are the CFD simulations showing the re-circulations in the dimples and the higher velocity in the dimpled tube. Further reading can be done from these scientific papers:\u003c\/p\u003e\u003cp\u003eFlow studies on increasing the efficiency of the inlet manifold\u003c\/p\u003e\u003cp\u003e.\u003c\/p\u003e\u003cp\u003eHydrodynamics of laminar flow through dimpled pipes\u003c\/p\u003e\u003cp\u003e.\u003c\/p\u003e\u003cp\u003eCARBON DUCTS\u003c\/p\u003e\u003cp\u003eTo ensure that the intake is fully sealed, the filter housings are mated to these carbon ducts which route cold air from the stock entry locations behind the headlamps. Made from prepreg carbon fiber, the ducts ensure that the engine bay heat is blocked from entering the filters. Simply having heat shields would not work as effectively since they cannot be air tight. There are many small details designed into the ducts such as the machined mounts to secure them to the stock airbox locations and the laser cut bracket work.\u003c\/p\u003e\u003cp\u003eCARBON MAIN TUBE\u003c\/p\u003e\u003cp\u003eThe filter housing on the right side of the engine is connected to a long tube to route the airflow to the turbo inlet. Our carbon tube replaces the stock version and has a smoother internal profile with a larger volume. At the filter side it starts with an internal diameter of 4\" and maintains this size up to the turbo inlet where is smoothly tapers down. The tube features integral brackets which help to secure the tube in a fixed location.\u003c\/p\u003e\u003cp\u003eThe complete system comes together to provide an intake which improves on the stock airbox in performance, aesthetics and sound. Available in Gloss or Mate finish.\u003c\/p\u003e","brand":"Eventuri","offers":[{"title":"Gloss","offer_id":46758490800207,"sku":"EVE-G8XMV2-CF-INT","price":5909.0,"currency_code":"AUD","in_stock":true},{"title":"Matte","offer_id":46758490832975,"sku":"EVE-G8XMV2-CFM-INT","price":5909.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/4383\/8543\/files\/EVE-G8XMV2-CFX-INT.jpg?v=1789182169"},{"product_id":"eventuri-bmw-g8x-m3-m4-carbon-fibre-engine-cover-eve-g8xm-cfx-eng","title":"Eventuri BMW G8X M3\/M4 Carbon Fibre Engine Cover - BMW M3 (G80), BMW M3 (G81), BMW M4 (G82)","description":"\u003ch1\u003eEventuri BMW G8X M3\/M4 Carbon Fibre Engine Cover\u003c\/h1\u003e\u003cp\u003e\u003cstrong\u003eProduct details:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe photos also show our intake system available separately.\u003c\/p\u003e\u003cp\u003ePart Numbers:\u003c\/p\u003e\u003cp\u003e✓ EVE-G8XM-CF-ENG : BMW G8X M3\/M4 Carbon Engine Cover - Gloss\u003c\/p\u003e","brand":"Eventuri","offers":[{"title":"Gloss","offer_id":46758491652175,"sku":"EVE-G8XM-CF-ENG","price":2159.0,"currency_code":"AUD","in_stock":true},{"title":"Matte","offer_id":46758491684943,"sku":"EVE-G8XM-CFM-ENG","price":2159.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/4383\/8543\/files\/EVE-G8XM-CFX-ENG.jpg?v=1789182164"},{"product_id":"akrapovic-slip-on-line-titanium-for-bmw-m3-m4-g80-g81-g82-g83-s-bm-ti-33h","title":"Akrapovic Slip-On Line (Titanium) - BMW M3 \/ M4 (G80, G81, G82, G83)","description":"\u003ch1\u003eAkrapovic Slip-On Line (Titanium)\u003c\/h1\u003e\u003cp\u003e\u003cstrong\u003eThe Tail Pipe Set (Carbon) has to be ordered separately as a mandatory part. Please choose TP-CT\/69 or TP-CT\/68 or TP-CT\/73\/CF.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis high-grade lightweight titanium system, finished with hand-crafted carbon-fibre tailpipes, weighs in at 35% lighter than stock and features a pair of collectors cast in the in-house foundry. The Slip-On Line (Titanium) comes with a specially developed Akrapovic control kit for a complete sound experience. The sound character offers a rich tone at normal cruising, rising to a deep sporty sound when the M3\/M4 is driven more dynamically. It serves up a perfect sound at all rpms, delivering comfort and sportiness in one exhaust. A ground-breaking octagonal shape has been fashioned from lightweight titanium with a carbon-fibre outer sleeve for the tailpipes, and for more traditional buyers there is the classic cylindrical design.\u003c\/p\u003e\u003cp\u003eThe system delivers power increases of 8.0 kW (10.9 hp) at 6,000 rpm and a torque gain of 13.9 Nm at 5,000 rpm when tested on the Akrapovic dyno against a BMW M4 Competition with a standard stock exhaust. Remapping is not needed for this configuration, and it fits all vehicles (OPF and non-OPF), but the ECE certificate is valid only for cars equipped with an OPF filter.\u003c\/p\u003e\u003cp\u003eOptional link pipes and downpipes are available for customers looking to change the exhaust for closed circuit usage. An optional Akrapovic Sound Kit is also available. With the installation of the optional link pipes, downpipes, and Akrapovic Sound Kit, ECE type approval of the Slip-On Line (Titanium) is no longer valid. An optional hand-crafted carbon-fibre rear diffuser is also available to add an extra visual impact to the Akrapovic tailpipes.\u003c\/p\u003e\u003cp\u003eThe exhaust system also fits on xDrive, CSL, LCI, M3 Touring (G81), M4 (G83) Competition and Convertible models. The ECE type-approval certificate is not valid for CSL model.\u003c\/p\u003e\u003cp\u003eThe Slip-On Line (Titanium) exhaust system is ECE type approved for cars equipped with an Otto\/gasoline particulate filter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTechnical Data:\u003c\/strong\u003e\u003c\/p\u003e","brand":"Akrapovic","offers":[{"title":"Default Title","offer_id":46758729842767,"sku":"S-BM\/TI\/33H","price":12789.0,"currency_code":"AUD","in_stock":true}]},{"product_id":"akrapovic-round-carbon-tail-pipe-set-for-bmw-m2-m3-m4-g80-g81-g82-g83-g87-tp-ct-68","title":"Akrapovic Round Carbon Tail Pipe Set - BMW M2 \/ M3 \/ M4 (G80, G81, G82, G83, G87)","description":"\u003ch1\u003eAkrapovic Round Carbon Tail Pipe Set\u003c\/h1\u003e\u003cp\u003eA ground-breaking octagonal shape has been fashioned from lightweight titanium with a carbon fibre outer sleeve, totally in keeping with lines of the car. For more traditional buyers, there is the classic cylindrical design, also constructed from same materials, but featuring an update to the current range of tailpipes for BMW cars available from Akrapovic.\u003c\/p\u003e","brand":"Akrapovic","offers":[{"title":"Default Title","offer_id":46758730072143,"sku":"TP-CT\/68","price":3749.0,"currency_code":"AUD","in_stock":true}]},{"product_id":"akrapovic-octagonal-carbon-tail-pipe-set-for-bmw-m2-m3-m4-g80-g81-g82-g83-g87-tp-ct-69","title":"Akrapovic Octagonal Carbon Tail Pipe Set - BMW M2 \/ M3 \/ M4 (G80, G81, G82, G83, G87)","description":"\u003ch1\u003eAkrapovic Octagonal Carbon Tail Pipe Set\u003c\/h1\u003e\u003cp\u003eA ground-breaking octagonal shape has been fashioned from lightweight titanium with a carbon-fibre outer sleeve, totally in keeping with lines of the car. For more traditional buyers, there is the classic cylindrical design, also constructed from same materials, but featuring an update to the current range of tailpipes for BMW cars available from Akrapovic.\u003c\/p\u003e","brand":"Akrapovic","offers":[{"title":"Default Title","offer_id":46758730661967,"sku":"TP-CT\/69","price":4049.0,"currency_code":"AUD","in_stock":true}]},{"product_id":"akrapovic-fitting-kit-for-bmw-m3-m4-g80-g81-p-hf1481","title":"Akrapovic Fitting kit - BMW M3 \/ M4 (G80, G81)","description":"\u003ch1\u003eAkrapovic Fitting kit\u003c\/h1\u003e\u003cp\u003eFitment notice:\u003c\/p\u003e\u003cp\u003eMandatory fitting kit, used for mounting the Rear Wing (Carbon) to BMW M3 (G80) and M340I (G20).\u003c\/p\u003e\u003cp\u003eThe product also fits on M3 LCI versions.\u003c\/p\u003e","brand":"Akrapovic","offers":[{"title":"Default Title","offer_id":46758730793039,"sku":"P-HF1481","price":949.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/4383\/8543\/files\/AKR-0013821.png?v=1789187302"},{"product_id":"akrapovic-chopped-carbon-tail-pipe-set-for-bmw-m2-m3-m4-g80-g81-g82-g83-g87-tp-ct-73-cf","title":"Akrapovic Chopped Carbon Tail Pipe Set - BMW M2 \/ M3 \/ M4 (G80, G81, G82, G83, G87)","description":"\u003ch1\u003eAkrapovic Chopped Carbon Tail Pipe Set\u003c\/h1\u003e\u003cp\u003eA ground-breaking octagonal shape has been fashioned from lightweight titanium with a chopped carbon-fibre outer sleeve, totally in keeping with lines of the car. For more traditional buyers, there is the classic cylindrical design, also constructed from same materials, but featuring an update to the current range of tailpipes for BMW cars available from Akrapovic.\u003c\/p\u003e","brand":"Akrapovic","offers":[{"title":"Default Title","offer_id":46758732988495,"sku":"TP-CT\/73\/CF","price":4239.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/4383\/8543\/files\/360_F_504289605_zehJiK0tCuZLP2MdfFBpcJdOVxKLnXg1.jpg?v=1789538853"},{"product_id":"akrapovic-exhaust-system-for-bmw-m3-m4-g80-g81-g82-g83-s-bm-ti-33h-kit","title":"Akrapovic Exhaust System - BMW M3\/M4 (G80, G81, G82, G83)","description":"\u003cdiv class=\"kit-components\"\u003e\n\u003cp\u003e\u003cstrong\u003eWhat this kit includes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIncluded as standard:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAkrapovic Slip-On Line (Titanium) for BMW M3 \/ M4 (G80, G81, G82, G83) (\u003cstrong\u003eS-BM\/TI\/33H\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eChoose one (required):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAkrapovic Round Carbon Tail Pipe Set for BMW M2 \/ M3 \/ M4 (G80, G81, G82, G83, G87) (\u003cstrong\u003eTP-CT\/68\u003c\/strong\u003e) — $3,749.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Octagonal Carbon Tail Pipe Set for BMW M2 \/ M3 \/ M4 (G80, G81, G82, G83, G87) (\u003cstrong\u003eTP-CT\/69\u003c\/strong\u003e) — $4,049.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Chopped Carbon Tail Pipe Set for BMW M2 \/ M3 \/ M4 (G80, G81, G82, G83, G87) (\u003cstrong\u003eTP-CT\/73\/CF\u003c\/strong\u003e) — $4,239.00\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOptional extras: Items marked below that are not in the selector above can be ordered as separate products.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAkrapovic Sound Kit for BMW G8X M3\/M4 (\u003cstrong\u003eP-HF1384\u003c\/strong\u003e) — $1,109.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Evolution Link Pipe set (SS) Long for G8X M2 \/ M3 \/ M4 (\u003cstrong\u003eE-BM\/SS\/9\u003c\/strong\u003e) — $3,619.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Evolution Link Pipe set (Titanium) Short for G8X M2 \/ M3 \/ M4 (\u003cstrong\u003eE-BM\/T\/14\u003c\/strong\u003e) — $3,799.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Rear Carbon Fibre Diffuser - Gloss for BMW G8X M3\/M4 (\u003cstrong\u003eDI-BM\/CA\/9\/G\u003c\/strong\u003e) — $4,129.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Rear Chopped Carbon Fibre Diffuser - Matte for BMW G8X M3\/M4 (\u003cstrong\u003eDI-BM\/CA\/9\/CF\u003c\/strong\u003e) — $4,199.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Downpipe w\/o Cat (SS) for BMW G8X M3\/M4 (\u003cstrong\u003eDP-BM\/SS\/9\u003c\/strong\u003e) — $4,549.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Evolution Link Pipe Set (Titanium) for BMW G8X M2\/M3\/M4 (\u003cstrong\u003eE-BM\/T\/12\u003c\/strong\u003e) — $5,049.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Rear Carbon Fibre Diffuser - Gloss Black for BMW G8X M3\/M4 (\u003cstrong\u003eDI-BM\/CA\/9\/GB\u003c\/strong\u003e) — $5,079.00\u003c\/li\u003e\n\u003cli\u003eAkrapovic Downpipe w Cat (SS) for BMW G8X M3\/M4 (\u003cstrong\u003eDP-BM\/SS\/8\u003c\/strong\u003e) — $7,689.00\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch1\u003eAkrapovic Exhaust System\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eThe Tail Pipe Set (Carbon) has to be ordered separately as a mandatory part. Please choose TP-CT\/69, TP-CT\/68 or TP-CT\/73\/CF.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Exhaust System for BMW M3\/M4 (G8X)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Slip-On Line (Titanium) for BMW M3 \/ M4 (G80, G81, G82, G83) (S-BM\/TI\/33H)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis high-grade lightweight titanium system, finished with hand-crafted carbon-fibre tailpipes, weighs in at 35% lighter than stock and features a pair of collectors cast in the in-house foundry. The Slip-On Line (Titanium) comes with a specially developed Akrapovic control kit for a complete sound experience. The sound character offers a rich tone at normal cruising, rising to a deep sporty sound when the M3\/M4 is driven more dynamically. It serves up a perfect sound at all rpms, delivering comfort and sportiness in one exhaust. A ground-breaking octagonal shape has been fashioned from lightweight titanium with a carbon-fibre outer sleeve for the tailpipes, and for more traditional buyers there is the classic cylindrical design.\u003c\/p\u003e\n\u003cp\u003eThe system delivers power increases of 8.0 kW (10.9 hp) at 6,000 rpm and a torque gain of 13.9 Nm at 5,000 rpm when tested on the Akrapovic dyno against a BMW M4 Competition with a standard stock exhaust. Remapping is not needed for this configuration, and it fits all vehicles (OPF and non-OPF), but the ECE certificate is valid only for cars equipped with an OPF filter.\u003c\/p\u003e\n\u003cp\u003eOptional link pipes and downpipes are available for customers looking to change the exhaust for closed circuit usage. An optional Akrapovic Sound Kit is also available. With the installation of the optional link pipes, downpipes, and Akrapovic Sound Kit, ECE type approval of the Slip-On Line (Titanium) is no longer valid. An optional hand-crafted carbon-fibre rear diffuser is also available to add an extra visual impact to the Akrapovic tailpipes.\u003c\/p\u003e\n\u003cp\u003eThe exhaust system also fits on xDrive, CSL, M3 Touring (G81), M4 (G83) Competition and Convertible models. The ECE type-approval certificate is not valid for CSL model.\u003c\/p\u003e\n\u003cp\u003eThe product also fits on M3 and M4 LCI versions.\u003c\/p\u003e\n\u003cp\u003eThe Slip-On Line (Titanium) exhaust system is ECE type approved for cars equipped with an Otto\/gasoline particulate filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMandatory Components:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Carbon Tail Pipe Set for BMW M2 Coupe (G87) (TP-CT\/68)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA ground-breaking octagonal shape has been fashioned from lightweight titanium with a carbon-fibre outer sleeve, totally in keeping with lines of the car. For more traditional buyers, there is the classic cylindrical design, also constructed from same materials, but featuring an update to the current range of tailpipes for BMW cars available from Akrapovic.\u003c\/p\u003e\n\u003cp\u003eThis product fits on xDrive, CSL, LCI, M3 Touring (G81), M4 (G83) Competition and Convertible models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Carbon Tail Pipe Set for BMW M2 Coupe (G87) (TP-CT\/69)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA ground-breaking octagonal shape has been fashioned from lightweight titanium with a carbon-fibre outer sleeve, totally in keeping with lines of the car. For more traditional buyers, there is the classic cylindrical design, also constructed from same materials, but featuring an update to the current range of tailpipes for BMW cars available from Akrapovic.\u003c\/p\u003e\n\u003cp\u003eThis product fits on xDrive, CSL, LCI, M3 Touring (G81), M4 (G83) Competition and Convertible models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Chopped Carbon Tail Pipe Set for G8X M2\/M3 (TP-CT\/73\/CF)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA ground-breaking octagonal shape has been fashioned from lightweight titanium with a chopped carbon-fibre outer sleeve, totally in keeping with lines of the car. For more traditional buyers, there is the classic cylindrical design, also constructed from same materials, but featuring an update to the current range of tailpipes for BMW cars available from Akrapovic.\u003c\/p\u003e\n\u003cp\u003eThe product also fits on M3 and M4 LCI versions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptional Components:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Evolution Link Pipe Set (Titanium) for BMW G8X M3\/M4 (E-BM\/T\/12)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvolution Link Pipe Set (Titanium) was tested and developed together with Slip-On Line (Titanium).\u003c\/p\u003e\n\u003cp\u003eConstructed from high-grade titanium, this noticeably lighter-than-stock link pipe features a resonator in the middle part. Available for all countries (United States excluded), the link pipe delivers a power gain of 17.7 kW (24.1 hp) at 6,650 rpm and torque increases of 25.4 Nm at 6,650 rpm when tested on the Akrapovic dyno against a BMW M4 Competition (OPF\/GPF) with a standard stock exhaust. Combined with a Slip-On Line (Titanium) delivering a deep, rich, and sporty sound without drone, it totally embraces the pure turbocharged inline six-cylinder sound. Remapping is mandatory. This product is meant for racetrack use and closed courses only.\u003c\/p\u003e\n\u003cp\u003eThis product fits on OPF and non-OPF vehicles.\u003c\/p\u003e\n\u003cp\u003eThe Evolution Link Pipe set (Titanium) – Long also fits on xDrive, CSL, LCI, M3 Touring (G81), M4 (G83) Competition and Convertible models.\u003c\/p\u003e\n\u003cp\u003eTHIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Evolution Link Pipe set (SS) Long for G8X M2 \/ M3 \/ M4 (E-BM\/SS\/9)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvolution Link Pipe Set (SS) was tested and developed together with Slip-On Line (Titanium).\u003c\/p\u003e\n\u003cp\u003eConstructed from high-grade stainless steel, this noticeably lighter-than-stock link pipe features a resonator in the middle part and removes the secondary set of catalytic converters. Available for all countries (United States excluded), the link pipe delivers a power gain of 13.4 kW (18.2 hp) at 5,850 rpm and torque increases of 21.9 Nm at 5,850 rpm when tested on the Akrapovic dyno against a BMW M2 (OPF\/GPF) with a standard stock exhaust. Combined with a Slip-On Line (Titanium) delivering a deep, rich, and sporty sound without drone, it totally embraces the pure turbocharged inline six-cylinder sound. Remapping is mandatory as the stock secondary catalytic converters are removed. This product is meant for racetrack use and closed courses only.\u003c\/p\u003e\n\u003cp\u003eThis product fits on OPF and non-OPF vehicles.\u003c\/p\u003e\n\u003cp\u003eTHIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Evolution Link Pipe set (Titanium) Short for G8X M2 \/ M3 \/ M4 (E-BM\/T\/14)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eConstructed from high-grade titanium, this lighter-than-stock link pipe is available for the United States only, the link pipe is shorter, allowing the stock catalytic converters to remain on the car. Combined with a Slip-On Line (Titanium) and delivering a deep, rich, and sporty sound without drone, it totally embraces the pure turbocharged inline six-cylinder sound. Remapping is mandatory. This product is meant for racetrack use and closed courses only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis product fits only on NON-OPF vehicles.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe product also fits on M3 and M4 LCI versions.\u003c\/p\u003e\n\u003cp\u003eTHIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Downpipe w Cat (SS) for BMW G8X M3\/M4 (DP-BM\/SS\/8)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDeveloped to be used in conjunction with the Akrapovic Slip-On Line (Titanium) and the Evolution Link Pipe Set (Titanium), this high-quality stainless steel downpipe set features a pair of sporty catalytic converters (200 cpsi) with heat insulation. The front part of the downpipes is cast in the in-house foundry, providing a perfect fit. Delivering a pure racing sound full of emotion, this provides great feedback at high revs, without drone. Remapping the ECU is mandatory to prevent potential check engine light warning signals. This product is meant for racetrack closed course use only.\u003c\/p\u003e\n\u003cp\u003eThis product fits on xDrive, CSL, LCI, M3 Touring (G81), M4 (G83) Competition and Convertible models.\u003c\/p\u003e\n\u003cp\u003eTHIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Downpipe w\/o Cat (SS) for BMW G8X M3\/M4 (DP-BM\/SS\/9)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDeveloped to be used in conjunction with the Akrapovic Slip-On Line (Titanium) and the Evolution Link Pipe Set (Titanium), this high-quality stainless-steel downpipe has the catalytic converters removed. Delivering a pure racing sound full of emotion, this provides great feedback at high revs, without drone. Remapping the ECU is mandatory to prevent potential check engine light warning signals. This product is meant for racetrack closed course use only.\u003c\/p\u003e\n\u003cp\u003eThis product fits on xDrive, CSL, LCI, M3 Touring (G81), M4 (G83) Competition and Convertible models.\u003c\/p\u003e\n\u003cp\u003eTHIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Sound Kit for BMW G8X M3\/M4 (P-HF1384)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe optional Akrapovic Sound Kit enables owners of selected Akrapovic car exhausts to control the sound of the system from the cockpit of their machine. Using Akrapovic technology, drivers can easily switch between the quiet mode and a sportier sound. With the use of a receiver to drive the actuators that open or close the valves at the end of the exhaust system, drivers can use the Sound Remote Controller to regulate the valves.\u003c\/p\u003e\n\u003cp\u003eWith the use of the optional Akrapovic Sound Kit, the ECE type approval is no longer valid.\u003c\/p\u003e\n\u003cp\u003eThe product also fits on M3 and M4 LCI versions.\u003c\/p\u003e\n\u003cp\u003ePictures are symbolic.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAkrapovic Rear Carbon Fibre Diffuser - Gloss for BMW G8X M3\/M4 (DI-BM\/CA\/9\/G)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor extra visual impact, there is the option to add a hand-crafted carbon fibre diffuser. 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