Milltek Sport Axle Back Exhaust | Rear Section/Back Box | JET-115 Carbon Fibre Tips | ECE/E-Marked | BMW M3 G80 & M3 Competition (2020+) OPF/GPF/PPF | T304 Stainless | Axleback Rear Silencer/Muffler Upgrade | Part No. SSXBM1173

Unlock the soundtrack your BMW deserves

Give your BMW M3 G80 and M3 Competition a richer, more purposeful tone and a premium rear-end look with this UK-built rear section featuring carbon fibre JET-115 tailpipe finishers. Designed for petrol particulate filter models from 2020 onward, this road-legal upgrade delivers a refined soundtrack on the motorway and a more engaging note when you push on.

Why enthusiasts choose this rear exhaust upgrade

• Crafted in the UK from high quality T304 stainless steel for long-term durability
• Free flowing pipework designed to complement OPF-equipped cars while keeping everyday drivability
• ECE type approval for peace of mind on the road
• Carbon fibre JET-115 tips provide a motorsport-inspired finish at the rear
• Deep, refined tone with clean clarity and minimal cabin boom
• Direct-fit rear section for the BMW M3 saloon platform G80 and M3 Competition, 2020 on, OPF/GPF only

Search-friendly fitment details

Suitable for: BMW M3 G80 and M3 Competition with petrol particulate filter from 2020+. Rear muffler and tailpipe assembly, often called a back box, rear section or axleback exhaust. E-marked for road use.

What you will love

• Instantly sharper aesthetics with carbon fibre tailpipe trims
• A more characterful exhaust note without sacrificing comfort on long journeys
• Precision UK manufacturing using corrosion-resistant stainless throughout

Real-world feedback

We run this setup on customer cars and the response has been excellent. Owners praise the premium finish, the deeper tone and the way it wakes up the car without unwelcome drone.

Part number

SSXBM1173

Professional installation

Want it fitted right first time? Book installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and availability.

Keywords shoppers use

BMW M3 G80 rear exhaust, back box upgrade, performance rear silencer, carbon fibre tips, OPF exhaust, G80 M3 rear section, axleback for PPF models, E-marked sports exhaust, stainless steel M3 exhaust, tailpipe upgrade.