Upgrade your Audi’s performance and unleash its full potential with BRONDEX® downpipes for Audi RS4 B9 and RS5 F5 2.9 V6 engines. Designed for drivers who demand more power, sharper response, and an aggressive exhaust tone, these downpipes transform your car into a true performance machine. Choose Your Downpipe Configuration for Audi RS4 B9 / RS5 F5: Catless Downpipes – Maximum power and sound, designed for track use. Catted Downpipes (Downpipes with 200-cell High-Flow Sports Catalytic Converters) – Optimized balance between performance, sound, and emissions compliance. Key Features: Significant Power Gains and Enhanced Exhaust Sound; Premium 304 Stainless Steel Construction – Corrosion-resistant and built to last; Pipe Diameter: 3.5" → 3" (89 mm → 76 mm) with 2 mm wall thickness; Precision Double-Sided Welding on flanges and stress points for durability; OEM-Compatible Design – Direct bolt-on fit for easy installation; Standard Oxygen Sensor Ports; Compatible with vehicles with or without OPF/GPF systems; Made in Europe to the highest manufacturing standards; 3-Year Warranty and Worldwide Shipping; Vehicle Compatibility: Audi RS4 B9 2.9 TFSI V6 (2018+) Audi RS5 F5 2.9 TFSI V6 (2018+) Enhance your Audi’s performance and driving experience with BRONDEX® Downpipes for RS4 and RS5 - engineered for power, precision, and sound.