Milltek Sport OPF/GPF-Back Valved Exhaust for BMW M3/M4 F80 F82 F83 (2018+) | S55 F8x Switchable Rear Section/Axle-Back | EC Approved or Race | GT-90 90mm Tailpipes | Saloon, Coupe, Convertible, Competition

Transform the tone of your F80 F82 F83 with a UK engineered valve-controlled system

Give your S55-powered M car the voice it should have. This UK built after-particulate-filter rear section is designed for September 2018 onwards cars with a petrol particulate filter, retaining factory valve control for everyday refinement and serious character when you want it. Available as EC Approved for the road or Race for track-only use, with premium GT-90 tailpipe options to suit your style.

We have fitted many of these at MJ Modifications and customers love the quality, the perfect fit, and the deep, motorsport-inspired soundtrack. It is a direct bolt-on upgrade that keeps OE valve motors so Comfort remains civil, while Sport unleashes a richer, more engaging note on throttle and lift-off.

Why enthusiasts choose this upgrade

• Tailored for F80 M3 Saloon, F82 M4 Coupe and F83 M4 Convertible with petrol particulate filter from 09-2018 onwards
• Uses original electronic valve actuators for plug-and-play switchable sound
• Choice of EC Approved road system or Race non EC Approved option for off-road use
• GT-90 90 mm tip finishes to match your build: Polished, Cerakote Black, Titanium, Burnt Titanium, Carbon Jet-90
• Made in the UK by a leading performance exhaust specialist for precise fit and a rich tone
• Pairs perfectly with large-bore downpipes, OPF delete and high flow sports cat for track builds where applicable

What is an after-OPF rear section

Often called OPF-back or GPF-back, this replaces the centre and rear sections after the particulate filter. It is ideal when you want a sound upgrade on OPF equipped cars while keeping the original emissions hardware in place.

What is included

• MSBM311 - Centre Section - EC Approved
• F20370 - Brace Bar
• MSBM269 - Rear Silencer Connecting Pipe Left Hand
• MSBM270 - Rear Silencer Connecting Pipe Right Hand
• MSBM256 - Rear Silencer
• Four GT-90 tailpipe trims in your chosen finish

Part numbers and finishes

• SSXBM1117 - Race - Non EC Approved - Polished GT-90
• SSXBM1118 - Race - Non EC Approved - Cerakote Black GT-90
• SSXBM1119 - Race - Non EC Approved - Titanium GT-90
• SSXBM1120 - Race - Non EC Approved - Burnt Titanium GT-90
• SSXBM1121 - Race - Non EC Approved - Carbon Jet-90
• SSXBM1122 - Road - EC Approved - Polished GT-90
• SSXBM1123 - Road - EC Approved - Cerakote Black GT-90
• SSXBM1124 - Road - EC Approved - Titanium GT-90
• SSXBM1125 - Road - EC Approved - Burnt Titanium GT-90
• SSXBM1126 - Road - EC Approved - Carbon Jet-90

Compatibility

• BMW F80 M3 Saloon - OPF or GPF models only - September 2018 onwards
• BMW F82 M4 Coupe and Competition - OPF or GPF models only - September 2018 onwards
• BMW F83 M4 Convertible - OPF or GPF models only - September 2018 onwards

Important notes

• Fits petrol particulate filter equipped vehicles only
• Reuses OE valve motors for full factory-style valve functionality
• Race non EC Approved options are for off-road and motorsport use where applicable

Fitment check before dispatch

We will confirm fitment before shipping. Add your UK registration number or the last 7 digits of your VIN at checkout so we can verify compatibility.

Professional installation

Want this upgrade fitted by specialists who know the F8x platform inside out? Book with MJ Modifications in Warwickshire and get a quote at info@mjmodifications.co.uk.

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