Introducing the MAD S58 Catted DownpipeThe perfect upgrade for BMW enthusiasts looking to unlock more performance and a deeper, more aggressive exhaust note without triggering a check engine light. Crafted from high-quality 304 stainless steel, this downpipe is built to handle extreme heat and harsh driving conditions. The smooth piping transitions are designed for maximum exhaust flow, delivering noticeable gains in horsepower, torque, and throttle response. Equipped with 300 cell high-flow catalytic converters, the MAD S58 Catted Downpipe improves engine sound and overall drivability while keeping the check engine light off. It bolts directly to the factory exhaust system with no cutting or welding required, making installation quick and hassle-free. It’s also fully compatible with most aftermarket exhaust systems, giving you the freedom to customize your build. No CEL guaranteeIf you get a check engine light related to the catalytic converter, MAD will replace the downpipe for free. Don’t settle for stock performance. Upgrade to the MAD S58 300 Cell Race Catted Downpipes and experience the full potential of your BMW. Race use only Features 300 CEL catalytic converters No check engine light guarantee Compatible with right-hand drive and left-hand drive vehicles Smooth bends for maximum airflow without drone Up to 30HP increase on stock turbos, even more with upgraded setups Lifetime warranty on defects and fitment 90-day return period Ships in 1 to 2 business days Spot-on fitment Flex section for added durability Fitment 2021 and up BMW M3 G80 2021 and up BMW M4 G82 and G83 2023 and up BMW M2 G87 DisclaimerFor race use only. This product is not certified for use on public roads and may not comply with local regulations. Always check your local laws before installing.
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