Milltek Sport OPF/GPF-Back Rear Section Exhaust for BMW M5 F90 2020+ (M5 & M5 Competition) 4.4 Twin-Turbo V8 – GT-100 100mm Quad Polished Tips – T304 Stainless Performance Rear Silencer/Backbox, Axle-Back PPF-Back, UK Made

British-made rear section exhaust for BMW M5 F90 2020 onwards with 100 mm quad polished tips

Transform the soundtrack and presence of your F90 saloon with this UK-engineered rear section designed to work with the factory petrol particulate filters. Crafted from premium T304 stainless steel and finished with mirror-polished 100 mm quad tailpipes, it delivers a richer, sportier tone, sharper throttle character and a factory-plus look that really fills the diffuser.

Highlights

• Purpose-built PPF-back system that retains the OE particulate filters and optimises flow after them
• Mirror-polished 100 mm quad exits for an aggressive OEM-plus aesthetic
• Type 304 non-magnetic stainless steel throughout for corrosion resistance and long-term durability
• Mandrel-bent pipework with precision joints for smooth, consistent gas flow
• Acoustically developed for a crisp, sporty note with minimal cabin drone at cruising speeds
• Designed, developed and hand finished in Britain

What you can expect

This particulate filter downstream upgrade frees up the rear section on OPF-equipped models, unlocking a deeper, more characterful V8 soundtrack under load while remaining refined on the motorway. The polished quad tailpipes complete the rear end with a purposeful, high-end finish that complements both M5 and M5 Competition models.

Why enthusiasts choose this system

We have installed and driven this exact setup on customer cars and our own demonstrators. Feedback is consistently positive on build quality, fitment and the balanced sound. It looks right, sounds right and is built to last in UK-grade stainless with mandrel bends that keep flow consistent.

Compatibility

• BMW M5 F90 4.4 bi-turbo V8 with OPF 2020 onwards
• BMW M5 Competition F90 4.4 bi-turbo V8 with OPF 2020 onwards

Fitting and support

Professional installation recommended. For fitting at MJ Modifications in Warwickshire, request a tailored quote: info@mjmodifications.co.uk.

Search-friendly terms

BMW F90 M5 exhaust upgrade, M5 Competition rear section, PPF-back exhaust for BMW, OPF back system for F90, quad 100 mm tailpipe kit, GT100 style tips, stainless performance exhaust UK, T304 stainless rear silencer, BMW M5 2020 on exhaust, bi-turbo V8 sound upgrade, non-drone exhaust M5, British engineered exhaust system, F90 saloon quad exit, M5 Comp exhaust tips 100 mm, performance rear box F90, cat-back style OPF-back solution, premium polished tailpipes, UK made M5 exhaust.