BMW S55 Resonated Catted Downpipes M2C M3 M4 W/ Flex Section

These high-performance downpipes are designed to reduce turbo back-pressure, increase horsepower, and provide a deeper, more aggressive exhaust sound without the unwanted rasp. Ideal for Stage 2 tuning and beyond, the catted version features 200-cell catalysts, offering reduced emissions while boosting overall engine performance. Key Features: Up to +30whp / 30wtq: Significant increase in power and torque, especially for high-boost tunes. Enhanced Exhaust Sound: Produces a deep, aggressive exhaust note, distinct from the high-pitched rasp of other catless downpipes. 304 Stainless Steel Construction: Built for durability, performance, and a precise fitment with factory mid-pipes. Improved Turbo Spool & Throttle Response: Reduces back-pressure, ensuring quicker spool times and improved throttle response. 200-Cell Catalysts: The catted version features high-flow 200-cell catalysts to improve emissions and flow efficiency without sacrificing power. Construction & Design:Each