BMW F8X M S55 Downpipes

Experience faster turbo response and increased power with RK Autowerks Catless Race Downpipes for BMW F8X S55 engines. These downpipes eliminate the restrictive factory catalytic converters, resulting in quicker spooling, improved throttle response, and a noticeable boost in horsepower and torque.

Engineered using precision 3D scanning and advanced prototyping, each unit is designed for a perfect OEM-like fit. Constructed from mandrel-bent T304 stainless steel and TIG-welded for maximum durability, these downpipes feature CNC-machined velocity stack flanges and heavy-duty v-band connections to ensure a long, leak-free lifespan.

Ideal for high-performance builds or track-focused F8X M cars, these downpipes also reduce under-hood temperatures and retain factory O2 sensor locations for plug-and-play installation.

Features:

• T304 Stainless Steel Construction
• Mandrel-Bent Tubing
• Precision TIG Welded Joints
• CNC Velocity Stack Turbo Flanges
• Stainless Steel V-Band Connections
• OEM O2 Sensor Bung Locations
• Significant Gains in Power, Response & Flow
• Reduced Under-Hood Heat

Vehicle Fitment:

• 2015–2018 BMW M3 (F80)
• 2015–2018 BMW M4 (F82/F83)
• 2018–2021 BMW M2 Competition (F87)

For Off-Road Use Only. Not legal for use on public roads in many regions. May trigger CEL.