Milltek Sport OPF/GPF-Back Non-Resonated Race Axle-Back Performance Exhaust with Cerakote Black GT90 90mm Tips for BMW 1 Series M140i B58 F20/F21 LCI (3 & 5 Door) 2019+ – Rear Silencer/Back Box Straight-Through T304

Turn your BMW 1 Series M140i into the soundtrack it deserves

Unleash a sharper, more motorsport character from your facelift BMW 1 Series M140i with this Milltek OPF back performance system. Designed for the 2019-on GPF equipped models, this rear section upgrade replaces the pipework after the particulate filter with free flowing T304 stainless steel and finishes the look with stealthy 90 mm Cerakote black GT90 tailpipes. If you want a louder, harder edged tone and a premium UK built exhaust upgrade that keeps the factory GPF in place, this is the go to choice.

What you get

• OPF back rear exhaust for facelift M140i 1 Series that retains the factory particulate filter
• Non resonated Race specification for a punchy, aggressive sound
• Cerakote black GT90 tailpipes 90 mm for a stealth, heat resistant finish
• UK made T304 stainless steel with mandrel bent tubing for smooth gas flow
• Precision crafted, durable and corrosion resistant construction
• Enlarged bore over stock to support performance while keeping everyday drivability

Fitment

• BMW 1 Series M140i F21 3 door LCI with GPF 2019 onward
• BMW 1 Series M140i F20 5 door LCI with GPF 2019 onward
• OPF or GPF models only. Not suitable for earlier non GPF cars

Built for sound and quality

This Milltek rear section is engineered to turn the muted factory note into a crisp, sporting soundtrack without touching the particulate filter. The straight through non resonated layout delivers a deeper tone at idle and a hard edged rasp under load. The Cerakote coated GT90 tips complete the look with a satin black finish that resists heat cycling and road grime. Made in the UK from premium T304 stainless with consistent radius bends for excellent flow and long term durability.

Proven by enthusiasts

We have supplied and fitted this OPF back system for M140i owners and the feedback is consistently positive. Customers comment on the sharper response, the rich, purposeful note and the quality of the black GT90 tailpipes that suit the M140i styling perfectly.

Professional installation

Prefer us to fit it We offer expert installation at MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Why choose this upgrade

• Serious sound upgrade for the B58 powered M140i while retaining the GPF
• Stealth look with ceramic coated 90 mm tips GT90
• High quality UK manufacture in T304 stainless steel
• Direct bolt on OPF back solution for F20 and F21 LCI models

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