MAD BMW F & G Chassis 5" B58 Catted Downpipe M240 340 M340 440 M440 540 W/ No CEL Guarantee & Bracket bmw f32 4 series 420 428 435 440 m performance style rear diffuser Faster wheel changes compared to

Faster wheel changes compared to factory wheel bolts

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and M340i (xDrive and diesel variations as well)

*In 2021 BMW switched some models to a flange style vs slip style downpipe setup

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MAD BMW F & G Chassis 5" B58 Catted Downpipe M240 340 M340 440 M440 540 W/ No CEL Guarantee & Bracket bmw f32 4 series 420 428 435 440 m performance style rear diffuser Faster wheel changes compared toUpgrade your BMWs performance and sound with the MAD 5" Catted Downpipe, engineered specifically for B58 powered BMW F and G chassis models. This high performance downpipe delivers increased horsepower, improved throttle response, and a deeper, more aggressive exhaust noteall without triggering a check engine light. Crafted from race grade 304 stainless steel, the downpipe features a smooth, mandrel bent 5" design for maximum flow. A 300 cell high