Remus Valved Cat-Back (Catback) Performance Sports Exhaust – Quad 84mm Chrome Rolled-Edge Tips – BMW 3 Series G20/G21 M340i/M340i xDrive B58 2019+, OE Valve Control, Stainless Steel

Transform your BMW 3 Series M340i with a premium valve-controlled performance exhaust upgrade designed for the G20 and G21 chassis from 2019 onwards. This catback system delivers a deeper, more aggressive tone under load while remaining refined at cruise, thanks to seamless integration with the factory valve actuators. Expect sharper throttle response, reduced backpressure and an exciting soundtrack from the B58 engine, all with precision fitment and beautiful quad 84 mm chrome rolled-edge tips.

• Engineered for BMW M340i G20 and G21 xDrive B58B30B from 2019 onwards
• Retains OEM valve operation for valve-controlled sound and drivability
• Quad 84 mm angled, rolled-edge, chromed tips for a premium factory-plus look
• Shot blasted finish and 100 percent stainless steel construction
• Improved flow and reduced backpressure for enhanced performance
• Lightweight design with a precise, direct-fit installation
• Handmade in Austria with outstanding build quality and attention to detail

Why choose this upgrade

• BMW M340i exhaust upgrade for G20 and G21 owners seeking a race-inspired soundtrack
• Sports exhaust tone with valve control to suit daily driving and spirited use
• High quality stainless system for durability and corrosion resistance
• Perfect for enthusiasts searching for a valved catback, quad tip exhaust, B58 exhaust or G20 G21 performance exhaust

Fitment notes

• The original exhaust requires cutting during installation
• Only suitable for vehicles with the M Sport option and the original BMW M340i G20 rear diffuser, BMW part number 51 12 8 069 391
• This system removes the GPF. An engine management light may illuminate and will require mapping out

Part numbers

085020 1000 + 085020 0000 + 085120 1500 + 0046 55S

What customers say

We have installed this system for multiple M340i clients and feedback has been superb. Owners love the deeper note, the quality finish and the way it elevates the character of the B58 without unwanted drone.

Professional fitting

For installation, we recommend MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk to request a fitting quote and availability.

Popular search terms

BMW M340i exhaust upgrade G20, G21 M340i sports exhaust, B58 catback, valve controlled exhaust BMW, quad tip exhaust 84 mm, stainless steel performance exhaust, G20 G21 xDrive exhaust system, Austrian made exhaust, rolled edge chrome tips, race sound exhaust.