BMW F80/F82/F83/F87C M2C / M3 / M4 400 Cell Catted Downpipes

BMW F8X M3 / M4 – EPA-Compliant 400 Cell Catted Downpipes Engineered for the S55 Twin-Turbo Inline-6 • High-Flow • Compliant • Introducing Our NEW 400 Cell EPA-Compliant Downpipes for the F8X Platform The BMW F8X M2, M3 and M4 are icons of modern performance, powered by the high-revving S55 twin-turbo inline-6. While the factory catalysts prioritize restriction and sound suppression, our NEW EPA-compliant 400 cell high-flow catted downpipes are engineered to unlock improved exhaust flow, sharper throttle response, and a more aggressive turbo character — all while maintaining emissions compliance standards. This is where the S55 truly comes alive. Why Upgrade to 400 Cell? EPA-Compliant 400 Cell High-Flow Catalysts: Increased exhaust efficiency while maintaining compliance standards. Faster Turbo Spool: Reduced backpressure enhances responsiveness and mid-range torque delivery. Sharper Exhaust Tone: Cleaner, more pronounced turbo acoustics with a deeper overall note. Street & Track Balanced: Noticeable performance gains without sacrificing daily drivability. Performance & Engineering Optimized Flow Design: Minimizes restriction while preserving catalyst efficiency. Mandrel-Bent Tubing: Ensures smooth internal transitions and consistent exhaust velocity. Precision TIG Welding: Built to endure high exhaust temperatures and sustained boost pressure. Direct OEM Bolt-On Installation: Utilizes factory mounting points for straightforward installation. Engineered to Pair Seamlessly with Valvetronic Exhaust Systems Sound Transformation Stock Exhaust + Downpipes: Noticeable increase in volume with stronger turbo presence and improved clarity. Valvetronic Exhaust + Downpipes: Maximum transformation — sharper crackles, enhanced turbo whistle, and a more aggressive high-RPM character. Construction & Durability Premium high-grade stainless steel construction High-temperature resistant 400 cell catalyst cores OEM-style sensor placement for proper operation Engineered for long-term reliability under high boost Unlock the true potential of your S55-powered M3 or M4 — starting at the source. 📩 Questions or ordering assistance? customerservice@valvetronic.com