BMW Catback Exhaust Systems for BMW F82 M4 S55 3.0L

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Catback Exhaust systems are designed to completely replace everything from your cats all the way back to your exhaust tips. Traditionally, if you are planning on upgrading your entire exhaust system, you will also need headers and downpipes.
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Active Autowerke Signature Performance Exhaust System - Brushed Silver Tips - F80/2/3 M3/M4
Active Autowerke Signature Performance Exhaust System - Brushed Silve...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Active Autowerke - Corporate Logo
T#:397486
Part#: 11-045
Ships in 3 Business Days
$ 3,563.00 USD
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$ 3,563.00 USD
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The 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!
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Milltek Performance Sport Cat Back - F80/F82 M3/M4
Milltek Performance Sport Cat Back - F80/F82 M3/M4
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport - Corporate Logo
T#:6476053
Part#: F8XSPORT
Ships in 3 Business Days
Sale - Save 10% $ 2,967.99

This product was last offered at the strikethrough price on
07-01-2026

Starting at $ 2,670.40 USD
Add to Wish List
Sale - Save 10%
$ 2,967.99

This product was last offered at the strikethrough price on
07-01-2026

Starting at $ 2,670.40 USD
Add to Wish List
Deciding on the right exhaust should include a blend of considerations: performance, quality, note, and style. The Milltek performance catback is a fantastic blend of these considerations. The performance and quality are top tier, with a note that is quite balanced. The system is constructed from aircraft-grade stainless steel that is beautiful to look at. These features and characteristics make the Milltek performance catback a great option.
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Equal Length Exhaust Upgrade Kit
Equal Length Exhaust Upgrade Kit
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport - Corporate Logo
T#:35391005
Part#: SSXBM1145
Ships in 3 Business Days
Sale - Save 10% $ 740.99

This product was last offered at the strikethrough price on
07-01-2026

$ 666.40 USD
Add to Wish List
Sale - Save 10%
$ 740.99

This product was last offered at the strikethrough price on
07-01-2026

$ 666.40 USD
Add to Wish List
Milltek's Cat-Back systems are meticulously engineered for those looking to improve both the sound and appearance of their vehicle. Designed as direct replacements for the factory exhaust, these systems come in a range of configurations, giving owners the flexibility to adjust the exhaust volume and achieve a more aggressive tone that fits their style. Made from high-quality 304L Aircraft Grade stainless steel, Milltek’s Cat-Back systems are built to endure the toughest conditions, ensuring exceptional durability and long-lasting performance.
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Milltek Performance Race Cat Back - F80/F82 M3/M4
Milltek Performance Race Cat Back - F80/F82 M3/M4
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport - Corporate Logo
T#:6476048
Part#: F8XRACE
Ships in 3 Business Days
Sale - Save 10% $ 2,971.99

This product was last offered at the strikethrough price on
07-01-2026

Starting at $ 2,674.25 USD
Add to Wish List
Sale - Save 10%
$ 2,971.99

This product was last offered at the strikethrough price on
07-01-2026

Starting at $ 2,674.25 USD
Add to Wish List
Deciding on the right exhaust should include a blend of considerations: performance, quality, note, and style. The Milltek performance catback is a fantastic blend of these considerations. The performance and quality are top tier, with a note that is quite balanced. The system is constructed from aircraft-grade stainless steel that is beautiful to look at. These features and characteristics make the Milltek performance catback a great option.
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Active Autowerke Signature Performance Exhaust System - Matte Black Tips - F80/2/3 M3/M4
Active Autowerke Signature Performance Exhaust System - Matte Black T...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Active Autowerke - Corporate Logo
T#:590346
Part#: 11-045MB
Ships in 3 Business Days
$ 3,629.00 USD
Free Shipping
Add to Wish List
$ 3,629.00 USD
Free Shipping
Add to Wish List
Active Autowerke is proud to announce the release of the Signature F8X M3/M4 Exhaust System. This system is the result of countless hours of R&D to obtain the perfect combination of performance and sound. Constructed of 100% 304 TIG welded stainless steel, Active Autowerke has created a modular exhaust system that will provide enough flow to support power levels way above the stock S55. The stock S55 Midpipe is a dual-pipe system from each turbo that leads to the rear muffler. The resulting sound is far from pleasant, and without any real scavenging effect the turbo lag is fairly pronounced. By converting to a single 3.5" pipe directly after the downpipes, AA's system promotes exhaust scavenging along with higher exhaust velocity to produce a quicker spool, more power, and a much smoother exhaust note.
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