Milltek80mm OPF Back ExhaustFitment: BMW G8X M3 M4 - Carbon Fibre Tips

Overview

Milltek OPF/GPF-back exhaust system for BMW G8X M3 and M4 (2021+). Direct factory fitment with centre resonator bypass and CNC-formed JET-115 carbon fibre trims. OE gasoline particulate filter remains in place; system mounts downstream.

T304L stainless steel, mandrel-bent construction throughout. Hand-finished welds. System engineered to restore acoustic character lost through OE particulate filtration while maintaining full emissions compliance. Centre resonator bypass refines mid-range tone; full-throttle note tuned for the S58 engine architecture.

Details

• T304L stainless steel, mandrel-bent pipes
• OE hangers and mounting points - no modification required
• Centre resonator bypass system included
• CNC carbon fibre tailpipe trims (JET-115 spec)
• OE particulate filter compatibility (cutting of OE silencer required)
• Decibel-tested for full-load character
• EC type-approved construction

Milltek develops OPF-back systems to balance OE+ acoustic engineering with emissions regulations. Where OE systems sacrifice tone for particulate capture, this system reclaims the B58/S58 soundtrack without sacrificing filter function.

Fits OE system.

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

Fitment