BMW F8X M2 / M3 / M4 Downpipe (S55) – Boosted Engineering

Unlock the true performance and sound of your BMW S55-powered M vehicle with the Boosted Engineering Downpipe. Designed for F8X M2, M3, and M4 models, this upgrade significantly reduces exhaust backpressure, allowing the engine to breathe more freely.

By improving exhaust flow directly from the turbochargers, this downpipe delivers faster turbo spool, increased power potential, and a more aggressive exhaust note. The result is sharper throttle response and a more responsive driving experience, especially on tuned vehicles.

Constructed from high-quality 304 stainless steel with precision TIG welding, this downpipe is built to withstand extreme heat and performance demands while maintaining reliable, OEM-style fitment for straightforward installation.

Key Features:
• Reduced exhaust backpressure for improved performance
• Faster turbo spool and enhanced throttle response
• Increased horsepower potential
• Aggressive, motorsport-inspired exhaust tone
• High-quality 304 stainless steel construction
• OEM-style fitment for seamless installation

Fitment:
• BMW F80 M3
• BMW F82 M4
• BMW F83 M4
• BMW F87 M2 (S55 models only)

Important Information:
• Professional installation recommended
• Tuning required for optimal performance
• Off-road / motorsport use only (check local regulations)

The following are typically required to run this kit at intended output. Boosted Engineering can supply or advise on all of them.

• ECU tune (custom)Boosted Engineering supplies base map
• Upgraded fuel systemInjectors, fuel pump — spec varies with output
• Upgraded ignitionR35 coilpack conversion recommended
• Upgraded clutchTwin-plate for higher-power builds
• Oil cooler kitRecommended for sustained high-load use
• Upgraded axlesFor 350+ kW builds

The Street Kit is designed for daily-drivable turbo builds with reliable, responsive power delivery. The Race Kit is oriented toward circuit and drag use where higher output and modular servicing are priorities.

The kit is designed for bolt-on installation in a suitably-equipped workshop. Installation is available at our Carrara QLD workshop, or through our trusted partner network in most metropolitan areas.

Approximate installation time — 20 to 30 hours depending on configuration and supporting work.