BMW M2 G80 / M3 G82 / M4 G87 DOWNPIPES HIGH FLOW CATS

• High-flow catalytic converters (200–400 cell) reduce backpressure and turbo lag
• 20–30 HP gains on stock tune; up to 60+ HP with ECU tuning
• Deeper, more aggressive exhaust note with enhanced turbo character
• Premium T304 stainless steel with mandrel-bent piping and TIG welds
• Direct bolt-on fit; compatible with OEM or aftermarket exhaust systems
• Improved mid-range torque and throttle response

• 1 x Pair of high-flow catted downpipes
• Mounting hardware
• O2 sensor bungs

• BMW G87 M2
• BMW G80 M3
• BMW G80 M3 Competition
• BMW G82 M4
• BMW G82 M4 Competition
• BMW G83 M4

• Direct bolt-on replacement—no cutting or modification to factory components required.
• Compatible with factory exhaust or aftermarket systems; includes O2 sensor bungs for seamless integration.
• Professional fitting is recommended to ensure correct installation and optimal performance mapping.
• Allow 2–3 hours for installation by a qualified technician.

Will these downpipes fit my M2 / M3 / M4?
Yes, these are engineered specifically for the BMW G87 M2, G80 M3 / M3 Competition, and G82 / G83 M4 / M4 Competition models. All use the S58 engine and OEM downpipe fitment points.

Do I need a tune or ECU remap to see power gains?
Stock tune delivers 20–30 HP gains. Pairing with an ECU remap optimises boost response and can achieve 60+ HP gains. Contact Project Styling for tuning recommendations.

Are these catted downpipes emissions-legal?
Yes. The high-flow catalytic converters maintain emissions compliance with significantly reduced restriction compared to OEM units, minimising check engine light risk.

Is professional fitting required?
Whilst experienced DIY enthusiasts may manage installation, professional fitting is recommended to ensure correct sealing, sensor integration, and performance mapping.