BMW S55 3in Catless Down pipes

Take your BMW M3 or M4 (F80 / F82 / F83) to the next level with our 3” Catless Downpipes, designed specifically for the twin-turbocharged S55 engine. By eliminating the restrictive factory catalytic converters, these downpipes drastically improve exhaust flow, reduce backpressure, and let your turbos breathe freely—unlocking serious performance gains and a raw, motorsport-inspired exhaust note.

Crafted from high-grade T304 stainless steel, these downpipes feature full 3” mandrel-bent tubing for maximum flow, CNC-machined flanges for a perfect OEM-like fit, and durable welds built to withstand extreme temperatures. The design tapers smoothly to connect seamlessly with stock or aftermarket exhaust systems, making installation a direct bolt-on upgrade.

Performance Benefits:

• Gains of +25–35whp / +30–40wtq with tuning

• Quicker turbo spool and sharper throttle response

• Aggressive exhaust tone with turbo spool whistle and sharper pops

• Direct fitment for F80 M3, F82/F83 M4, and S55-powered models

Whether you’re chasing track performance or looking to transform your street driving experience, these downpipes deliver the uncompromised flow and sound that the S55 deserves.

⚠️ For off-road / race use only. Not emissions compliant. Will trigger a CEL without tuning.