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Unleash the full potential of your BMW X3 M40i (G01) or X4 M40i (G02) with the MAD Catback Exhaust System
Kies Motorsports is not responsible for poor labor practices
Polypropylene Material (PP)
Every watt of power generated by your amplifier yields about 2x the bass output with our woofers vs factory woofers
MAD BMW S58 Catted Downpipes M3 M4 G80 G82 G83 W/ No CEL Guarantee & Flex Section BMW-E46 M3-2002 Unleash the full potential ofUnlock Performance with the MAD 300 Cell Catted Downpipes for BMW S58 EnginesElevate your BMWs performance and driving experience with the MAD Catted Downpipes designed specifically for the S58 powered M3, M4, and M2 models. Engineered to deliver maximum exhaust flow and throttle response, these high performance downpipes provide an aggressive, refined sound without triggering a check engine light. Constructed from high quality 304 stainless steel,
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