S55 Catless 3 Inch Downpipes - F80 M3 / F82 F83 M4 / F87 M2

Unleash the full potential of your BMW S55 with the Bimmer Source 3” Catless Downpipes.

Replace your restrictive stock catalytic converters with the Bimmer Source 3” S55 downpipes to eliminate backpressure and maximize airflow. The result? Faster turbo spool, maximum power, and an aggressive exhaust note that transforms your driving experience.

On a tuned S55 with stock turbos, expect gains of up to 30HP—with even greater results on cars running upgraded turbos. The built-in flex pipe helps absorb heat and engine movement, reducing stress and unwanted vibration for long-term reliability.

Key Features:

• Compatible with both left-hand drive (LHD) and right-hand drive (RHD) models
• Smooth mandrel bends for maximum airflow without drone
• Up to 30HP increase on stock turbos; even more on upgraded setups
• Flex section for reduced vibration and improved durability
• Lifetime warranty on defects and fitment
• 90-day return policy for peace of mind
• Fast shipping (1–2 business days)
• Guaranteed spot-on fitmen