COMPATIBLE: (3.0L - S55B30)

2018 - 2021 BMW M2C

2014 - 2019 BMW M3 

2014 - 2020 BMW M4 

S55 downpipes are designed to seamlessly fit in place of your restrictive stock downpipes on BMW M3 (F80) and M4 (F82/F83) models, which are situated immediately after your catalytic converters. Upgraded downpipes provide great increases in horsepower and torque on turbocharged vehicles by allowing exhaust gases to flow easier as they leave the turbo. The high-quality exhaust manifold can improve the exhaust airflow rate and ensure you have a better driving experience. 

1. Improve Engine Output and Efficiency, Give you an extra HPs, and increases torque 2. Large diameter and free flow tubing for unrestricted flow, Making the exhaust air flow smooth, Designed for high-performance racing 3. Made of High-Quality 16-gauge T-304 Stainless Steel with Computerized Mandrel-Bends 4. All joints are TIG welded to prevent cracking and wear 5. CNC Machine Flange for MAX Strength and Durability 6. Flanges chrome plated for corrosion resistance 
   
   

2. The downpipe on your turbocharged vehicle directs exhaust gases out of the turbine housing and into the exhaust system. An aftermarket downpipe, like S55 downpipes for BMW M3 (F80) and M4 (F82/F83), is typically larger in diameter and either uses a high-flow catalytic converter or removes it entirely. By replacing the restrictive factory downpipe with a high-flowing unit, you allow the turbo to expel gases more efficiently, resulting in increased power. With factory restrictions removed, boost levels can be safely increased, eliminating one of the key bottlenecks in your S55-powered BMW’s performance.