Akrapovic Slip-On Line Titanium Exhaust for BMW 3 Series M340i (G20/G21) OPF/GPF-Back, Valved, Carbon Fibre Tips – ECE Approved | S-BM/T/17H

Premium Titanium Rear System for BMW M340i G20 G21 with OPF or GPF

Unlock a richer soundtrack, tangible performance gains and a motorsport look with this titanium rear section crafted by Akrapovic for the BMW 3 Series M340i. Built from ultra-lightweight titanium and finished with beautifully made carbon fibre tailpipe sleeves, this OPF-back system brings sharper response, reduced mass and a deeper, more characterful tone while remaining civilised on the motorway. It is ECE approved for road use and integrates seamlessly with factory valve control.

If you are searching for a high quality axle-back for your G20 saloon or G21 Touring, a valved rear silencer that is OPF-safe, or a titanium back box that transforms the 3.0 straight-six note without drone, this is the enthusiast’s choice. We have fitted this system for customers and the feedback has been overwhelmingly positive for sound, finish and weight saving.

Why choose this titanium rear section

• Superb strength-to-weight ratio from full titanium construction
• Carbon fibre tailpipe ends for an authentic motorsport aesthetic
• Valve-controlled sound management for quiet cruising or a more aggressive tone on demand
• OPF-back design that works perfectly with GPF-equipped vehicles
• Adjustable acoustic reflector before the tips to tune in-cabin character
• Direct fit with OEM-style integration and no check lights
• ECE type approved for street legality

Proven gains

• Power increase: +8.7 kW at 5600 rpm
• Torque increase: +17.1 Nm at 4100 rpm
• Weight reduction: -6.5 kg

Compatibility

BMW 3 Series M340i G20 and G21 (2021 onwards), including xDrive models.

Options and upgrades

• Akrapovic Sound Kit for in-cabin control of the valves
• Optional Akrapovic stainless steel Link Pipe Set for M340i and M440i to complete the system

Installation

This OPF-back axle section requires cutting of the original exhaust as per Akrapovic instructions. Professional installation recommended.

Prefer expert fitting and alignment checks on your G20 or G21. Book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Real-world feedback

Customers love the deep, clean tone with valves open, the refined character with valves closed, and the stunning carbon tips. The reduction in weight is noticeable, and cabin comfort remains excellent on long journeys.

Part number and warranty

Part number: S-BM/T/17H

Warranty: Akrapovic One Year Warranty

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