Milltek OPF Back Exhaust - BMW G20 M340i & G22 M440i - Polished Tips - SSXBM1158

Direct-fit OPF back exhaust system for BMW G20/G21 M340i and G22 M440i, engineered to replace the factory gasoline particulate filter section while maintaining full emissions compliance. Quad GT-100 polished tailpipes deliver aggressive stance and refined tone character across the rev range.

Hand-finished T304L stainless steel construction with mandrel-bent piping ensures durability and consistent flow. System uses original BMW hangers and mounting points-no modifications required. Available in resonated and non-resonated configurations to suit street or closed-course application.

• Fitment: BMW G20 M340i (2021+), BMW G21 M340i Touring (2020-2023), BMW G22 M440i (2021-2023)
• Material: T304L stainless steel, hand-finished
• Tailpipes: Quad GT-100 polished trims
• Installation: OEM+ fitment, no cutting or welding
• Configuration: Select resonated or non-resonated variant at checkout

Milltek exhausts are precision-manufactured and designed for measurable performance gains alongside refined acoustic character-built to perform, not simply fitted and forgotten.

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

Specifications

• Pipe diameter: 76.2mm (3.00")
• Fitting time: 2 to 2.5 hours, including removing the factory system
• E-marked for road use

Fitment

• BMW > 3 Series > G20 M340i Sedan inc Xdrive > 2021 and Later
• BMW > 4 Series > G22 M440i Coupe (NAS/ROW Vehicles Only) > 2021 and Later

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.