{"product_id":"active-autowerke-bmw-m3-m4-f80-f82-f83-maad-maax-rear-exhaust-section","title":"Active Autowerke BMW M3\/M4 (F80\/F82\/F83) Maad Maax Rear Exhaust Section","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe factory F8X exhaust uses a middle and rear silencer alongside a pair of exhaust valves, designed to be free-flowing while still meeting drive-by noise regulations. The rear silencer uses a reflection chamber on each side that redirects exhaust gases to the opposite side from where they entered (the driver's side exhaust exits on the passenger side), and when the valves are closed, this design helps manage backpressure buildup from noise dampening. The result, in practice, is a flat, buzzy tone that many owners describe as more \"weed eater\" than proper M car.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eAfter analysing the factory system, Active Autowerke concluded that less would be more, and built the Maad Maxx rear section around a complete redesign of that philosophy. The triple-canister muffler design delivers superior resonance control and reduced drone compared to the factory back box, while an optimised-flow axle-back layout complements the F8X platform's natural characteristics. Flex joints reduce vibration transfer, and the valved design gives you volume control exactly when you want it, aggressive and deep with the valves open, civil and refined when you need it. Every unit is test-fit on a dedicated F8X exhaust fixture, guaranteed to fit all F80 M3 and F82\/F83 M4 models, and comes with all necessary installation hardware.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWorks with:\u003c\/strong\u003e Best paired with Active Autowerke's F8X Midpipe for the deepest tone and full performance gains. On an independent Mustang dyno, stock figures of 380whp\/371wtq climbed to 398whp\/401wtq with the full Active Autowerke exhaust system fitted (rear section plus midpipe).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003eWhy Choose This Rear Exhaust Section\u003c\/h2\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTriple-canister muffler design for superior resonance control and reduced drone\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEliminates the factory system's flat, buzzy tone\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eValved design, aggressive with the valves open, refined and civil when closed\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFlex joints to reduce vibration transfer\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTest-fit on a dedicated F8X exhaust fixture, guaranteed fitment\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e18+ WHP and 30+ lb-ft gains when paired with Active Autowerke's F8X Midpipe\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAll installation hardware included, made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003eCompatibility\u003c\/h2\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW F80 M3 (S55, 2014+)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW F82\/F83 M4 (S55, 2014+)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection id=\"shopify-section-template--23383691428165__main\" class=\"shopify-section section\"\u003e\n\u003cdiv class=\"page-width\"\u003e\n\u003cdiv class=\"product product--small product--left product--thumbnail_slider product--mobile-show grid grid--1-col grid--2-col-tablet\"\u003e\n\u003cdiv class=\"product__info-wrapper grid__item product__info-wrapper--extra-padding scroll-trigger animate--slide-in\"\u003e\n\u003csection id=\"ProductInfo-template--23383691428165__main\" class=\"product__info-container product__column-sticky\"\u003e\n\u003cdiv class=\"product__description rte quick-add-hidden\"\u003e\n\u003csection id=\"shopify-section-template--23383691428165__main\" class=\"shopify-section section\"\u003e\n\u003cdiv class=\"page-width\"\u003e\n\u003cdiv class=\"product product--small product--left product--thumbnail_slider product--mobile-show grid grid--1-col grid--2-col-tablet\"\u003e\n\u003cdiv class=\"product__info-wrapper grid__item product__info-wrapper--extra-padding scroll-trigger animate--slide-in\"\u003e\n\u003csection id=\"ProductInfo-template--23383691428165__main\" class=\"product__info-container product__column-sticky\"\u003e\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"Active Autowerke","offers":[{"title":"Brushed Silver","offer_id":54423746642253,"sku":"AAW-SIL-S55-001","price":3292.51,"currency_code":"EUR","in_stock":false},{"title":"Matte Black","offer_id":54423746675021,"sku":"AAW-SIL-S55-001","price":3381.44,"currency_code":"EUR","in_stock":false},{"title":"Carbon Fibre","offer_id":54423746707789,"sku":"AAW-SIL-S55-001","price":3927.76,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0980\/4808\/2253\/files\/Active-Autowerke-BMW-f8x-axleback-maad-maax.jpg?v=1785350332","url":"https:\/\/i6tuning.com\/products\/active-autowerke-bmw-m3-m4-f80-f82-f83-maad-maax-rear-exhaust-section","provider":"i6 Tuning","version":"1.0","type":"link"}