Milltek80mm OPF/GPF Back ExhaustFitment: BMW G8X M3 M4

Overview

Milltek OPF/GPF-Back exhaust system with centre resonator bypass for BMW G8X M3 and M4 (late 2018+). Direct factory fitment; OE particulate filter removal required. Hand-finished T304L stainless steel construction with mandrel-bent piping and CNC-formed GT-115 polished trim tips.

The OPF/GPF filter reduces emissions but constrains exhaust tone. This system restores the M3/M4 signature character by routing exhaust through a resonator bypass, engineered to recover full-throttle definition while maintaining street-legal operation. Centre-exit configuration preserves OEM aesthetics. No additional hangers or brackets required.

Details

• T304L stainless steel, hand-finished
• Mandrel-bent pipe work for flow optimization
• Centre resonator bypass system
• GT-115 polished stainless steel trim tips
• OEM+ fitment using factory mounting points
• OE particulate filter removal required
• BMW G8X M3 (S58 engine) direct fit
• BMW G8X M4 (S58 engine) direct fit

Engineered to restore the M3/M4's performance tone without compromise to build quality or fitment precision.

Fits OE system.

Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Fitment