{"product_id":"maad-maxx-f8x-bmw-m3-m4-rear-exhaust-section-3-can-valved","title":"Active Autowerke Maad Maxx - F8x BMW M3 \u0026 M4 Rear Exhaust Section - 3 Can Valved","description":"\u003ch4\u003eThe Ultimate F8X BMW M3 \u0026amp; M4 Rear Exhaust System - now with valves\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cp\u003eAt Active Autowerke, it's not ONLY about making as much power as possible. For over 30 years, power has been the end result of improved performance due to our relentless desire to develop a refined, quality product. This philosophy behind our performance parts is best represented by one of the newest additions to our F80 BMW M3 and F82 BMW M4 collection.\u003c\/p\u003e\n\u003cp\u003eThe Active Autowerke F8X rear exhaust was carefully engineered to eliminate the unflattering sound of the factory M3 and M4 exhaust, while also allowing for optimum flow and resonance. Every effort was made in addressing the not so appeasing sound of the stock OEM exhaust, but in designing an exhaust worthy for an \"M\" car. We believe our rear exhaust combined with our mid-pipe offers the deepest sound and best performance of any other system on the market today. Available for both models, this axle-back exhaust gives your BMW the deep, throaty, growl a car of its caliber should have had from the factory! And NOW, after many requests from our dedicated customers, we are introducing a valved version of the ultimate exhaust which has been dubbed \"Maad Maxx\" by our team. We will update dyno charts later but this exhaust flows even better with its valved system.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/f80.bimmerpost.com\/forums\/showthread.php?t=1194246\" title=\"active autowerke m4 exhaust review\" target=\"_blank\"\u003eSee what actual customers are saying on BimmerPost!\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eKey features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003e18+ WHP gain over stock\u003csup\u003e*\u003c\/sup\u003e\n\u003c\/li\u003e\n\u003cli\u003e30+ LB-FT gain over stock\u003csup\u003e*\u003c\/sup\u003e\n\u003c\/li\u003e\n\u003cli\u003eQuicker turbo spool\u003c\/li\u003e\n\u003cli\u003eLow, Deep Rumble\u003c\/li\u003e\n\u003cli\u003eFlex joints to reduce vibration\u003c\/li\u003e\n\u003cli\u003eDouble-canned muffler to reduce resonance\u003c\/li\u003e\n\u003cli\u003eEach exhaust test-fit on our F8X Exhaust Fixture\u003c\/li\u003e\n\u003cli\u003eGuaranteed to fit all F80 BMW M3\/F82 BMW M4\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary installation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e*W\u003cem\u003ehen paired with \u003ca href=\"http:\/\/store.activeautowerke.com\/products\/f8x-bmw-m3-m4-mid-pipe\" title=\"f8x bmw m3 bmw m4 performance mid pipe\"\u003eActive Autowerke F8X Mid-Pipe\u003c\/a\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch4\u003eMustang Dyno Results:\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/c1.staticflickr.com\/1\/628\/21607095396_132b0d3266_c.jpg\"\u003e\u003c\/p\u003e\n\u003ch3\u003eModifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eActive Autowerke F8x Mid-Pipe\u003c\/li\u003e\n\u003cli\u003eActive Autowerke F8X Rear Exhaust Section\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eResults:\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003eRED Line Stock Figures: 380 \u003cem\u003eWHP | \u003c\/em\u003e371 \u003cem\u003eWTQ\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #0000ff;\"\u003eBLUE Line Full Active Autowerke Exhaust: 398 \u003cem\u003eWHP | 401 WTQ\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ffd966;\"\u003eGOLD Line Full Active Autowerke Exhaust Run 2: 397 \u003cem\u003eWHP | \u003c\/em\u003e398 \u003cem\u003eWTQ\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003eNote:\u003cstrong\u003e \u003cem\u003eActive Autowerke Full Exhaust System is recommended for, BUT NOT LIMITED TO, off-road or racing applications. \u003c\/em\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eRefinement Meets Performance:\u003c\/h4\u003e\n\u003cp\u003eThe OEM F8X exhaust utilizes the services of middle and rear silencer as well a pair of exhaust valves. It is supposed to be a freely-flowing exhaust that produces an external sound that meets the demands of a M3 or M4.\u003c\/p\u003e\n\u003cp\u003eThe middle silencer has a small crossover that allows for noise dampening while the rear silencer (muffler) has a reflection chamber on either end that re-directs exhaust gases to the opposite side they entered from (drive's side exhaust exits on passenger side). When the exhaust valves are closed, this helps eliminate the back pressure buildup that occurs during noise dampening.\u003c\/p\u003e\n\u003cp\u003eAfter analyzing the factory exhaust, we realized less would be more in regards to our F8X exhaust.\u003c\/p\u003e\n\u003cp\u003eWe began with a complete redesign of the mid-pipes. This involved drastically increasing exhaust flow as well as reducing the uneven, out-of-sync turbocharger's sound that many F8X owners have complained about on the forums. We were able to achieve this on our F8X Mid-Pipe (sold separately) by using a single pipe that not only cancels out the offensive sound, but allows unrestricted exhaust flow.\u003c\/p\u003e\n\u003cp\u003eThe most noticeable difference between the Active Autowerke F8X Rear Exhaust Section and the BMW factory exhaust is how we utilized the muffler. Our design incorporates two mufflers that create a huge resonance chamber to further cancel out the weed eater noise.\u003c\/p\u003e\n\u003cp\u003eThis design also allows exhaust gases to crossover freely without being forced in a certain direction - eliminating back pressure without sacrificing that deep, aggressive rumble that some turbocharged cars are known for.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eNote: Active Autowerke GUARANTEES that each and every F8X Rear Exhaust Section will be a precise fit. Every Active Autowerke F8X Rear Exhaust Section is test-fitted on our in-house F8X Exhaust Fixture as part of our quality control measures. \u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003ca href=\"http:\/\/images.activeautowerke.com\/Installation%20PDF's\/F80%20-M4-M3%20REAR%20EXHAUST%20INSTALLATION%20%20INSTRUCTIONS%20(OPTIOANL%20MID%20PIPE)%2011%203%2015%20R2.pdf\" title=\"BMW M4 Installation instructions\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0578\/5357\/files\/pdf-icon_small.png?5194202583727197452\" alt=\"BMW M4 installation instructions\" style=\"float: none;\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv style=\"display: none;\" class=\"sb-car-tag-by-description\"\u003eyear-2014,year-2014-make-bmw,year-2014-make-bmw-model-m3,year-2014-make-bmw-model-m4,year-2015,year-2015-make-bmw,year-2015-make-bmw-model-m3,year-2015-make-bmw-model-m4,year-2016,year-2016-make-bmw,year-2016-make-bmw-model-m3,year-2016-make-bmw-model-m4,year-2017,year-2017-make-bmw,year-2017-make-bmw-model-m3,year-2017-make-bmw-model-m4,year-2018,year-2018-make-bmw,year-2018-make-bmw-model-m3,year-2018-make-bmw-model-m4,year-2019,year-2019-make-bmw,year-2019-make-bmw-model-m4,year-2020,year-2020-make-bmw,year-2020-make-bmw-model-m4\u003c\/div\u003e \u003cp\u003e\u003ca href=\"https:\/\/svbimmer.com\/pages\/emissions-notice\" target=\"_blank\"\u003e\u003cstrong\u003eVIEW EMISSIONS NOTICE\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Active Autowerke","offers":[{"title":"w stainless brushed tips","offer_id":44905608347848,"sku":"11-073","price":2499.0,"currency_code":"USD","in_stock":true},{"title":"w matte black tips","offer_id":44905608380616,"sku":"11-073B","price":2569.0,"currency_code":"USD","in_stock":true},{"title":"w carbon fiber tips","offer_id":44905608413384,"sku":"11-073C","price":2999.0,"currency_code":"USD","in_stock":true},{"title":"w carbon over black tips","offer_id":44905608446152,"sku":"11-073CB","price":3099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0210\/4203\/6785\/files\/Active-Autowerke-Maad-Maxx-F8x-BMW-M3-M4-Rear-Exhaust-Section-3-Can-Valved.jpg?v=1769351874","url":"https:\/\/svbimmer.com\/products\/maad-maxx-f8x-bmw-m3-m4-rear-exhaust-section-3-can-valved","provider":"SVBimmer","version":"1.0","type":"link"}