Milltek Sport OPF/GPF-Back Exhaust System for BMW 128ti F40 1 Series (2021+) 5-Door | GT-115 Burnt Titanium Tips | Type 304 Stainless Steel | SSXBM1205

Milltek rear section upgrade with GT-115 burnt blue titanium finishers for BMW F40 128ti 5 door - Part No. SSXBM1205

Turn your F40 128ti into the hot hatch it should have been from the factory. This Milltek rear system delivers a deeper, cleaner soundtrack, razor-sharp build quality and a premium motorsport look thanks to the stunning GT-115 burnt titanium tailpipe finishers. Fabricated in the UK from T304 grade austenitic stainless, it is built to resist corrosion and keep sounding great mile after mile.

Engineered for flow and tone, the precision mandrel-bent pipework maintains a constant radius through every bend. The result is improved gas velocity and a crisper throttle response, with careful acoustic tuning that keeps motorway manners calm and eliminates the boomy drone you get with lesser systems. It is a direct-fit, post-particulate-filter assembly that bolts up to the OE mounting points for a hassle-free install.

Why this upgrade works on the 128ti

• Sharper soundtrack - purposeful on throttle, civilised at a cruise
• Optimised flow - constant-radius bends and enlarged sections aid response
• Durable materials - full T304 stainless for long-term reliability
• Motorsport aesthetic - GT-115 burnt titanium tips complete the rear end
• Designed and hand finished in Britain - quality you can see and hear

Fitment

For BMW 128ti F40 5 door models from 2021 onwards with gasoline particulate filter. This is a particulate filter back system that replaces the sections after the OPF/GPF. Direct replacement using factory hangers, no modification to the filter required.

Part number

SSXBM1205

What our customers say

We run this setup on customer cars and feedback has been consistently positive - superb fit, refined daily sound with a proper growl when you want it, and top-tier finish on the burnt blue GT-115 tips.

Professional fitting

Want it installed correctly first time? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and lead time.

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