Cobra Sport BMW M135i xDrive F40 (2019+) OPF/GPF/PPF-Back Valved/Non-Valved Performance Exhaust System - 3in (76.2mm) Centre & Rear Sections, Rear Silencer/Back Box Delete, Axle-Back Cat-Back Alternative, Mid Pipe Upgrade, Carbon Fibre 4in Tips

Unlock serious tone and character for your F40 M135i

Give your BMW hot hatch the voice it deserves with this valve-controlled particulate filter back system from Cobra Sport. Replacing the mid-section and rear silencer with free flowing 3 inch 76.2 mm pipework, it delivers a deeper, harder-hitting soundtrack while keeping the factory catalyst and particulate filter in place. If you are chasing a sharper, more aggressive note without touching emissions hardware, this is the upgrade.

Why enthusiasts choose this setup

• Free flowing 3 inch 76.2 mm bore for improved gas velocity and a richer exhaust note
• Connects after the PPF OPF GPF for a true particulate filter back solution
• Rear silencer delete for maximum presence and a motorsport-inspired character
• Valve-controlled option keeps OEM drive mode functionality for quiet to loud on demand
• Centre and rear section replacement with all required fittings and gaskets included
• Direct bolt-on upgrade that keeps the original catalyst and particulate filter untouched

Real-world sound data

• Idle: 73.5 dB increase of 10.5 dB over stock
• Static 3,800 rpm: 95.1 dB increase of 13.1 dB over stock

Valve options explained

• Valved: Retains the exhaust valve. Switching drive modes continues to alter volume and tone as from the factory.
• Non valved: Removes valve control. Drive modes will not change exhaust loudness. Designed to work perfectly with the vehicle.

Tailpipe finishes

Choose premium 4 inch 101.6 mm outlets, including stunning carbon fibre tips, for a race-ready rear end that looks as good as it sounds.

Our take

We have fitted and run this Cobra Sport system on customer cars and it impresses every time. Owners love the deeper bass, the cleaner tone at cruise, and the way it really comes alive under load. A brilliant PPF back solution if you want drama and drivability in one package.

Professional installation

Want it fitted by specialists We offer expert installation at MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

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