Milltek Sport OPF/GPF-Back Rear Exhaust for BMW M135i xDrive F40 (2019+, 5 Door) - Axle-Back/Back Box Upgrade, GT-115 Burnt Titanium Blue Tips, T304 Stainless - 1 Series M135i Performance Tailpipe/Silencer

Transform your BMW 1 Series M135i xDrive F40 with a premium rear-section performance exhaust

Unlock a richer soundtrack and a sharper rear-end look with this UK-built Milltek Sport OPF-back and GPF-back rear system for the BMW M135i xDrive F40 5 door, 2019 onwards. Finished with stunning GT-115 burnt titanium tailpipe trims, this upgrade delivers a refined, motorsport-inspired note while keeping the petrol particulate filter in place for straightforward road use. We have fitted this setup for customers and the feedback on tone, fitment and finish has been outstanding.

Premium materials and craftsmanship

Constructed in the UK from high grade T304 non-magnetic stainless tubing, this rear exhaust section is engineered for durability and corrosion resistance. Precision mandrel bending maintains smooth radii for efficient gas flow, helping the M135i sound more purposeful without harsh drone. Every system is acoustically developed to give a deeper, sportier character inside and out.

Standout GT-115 burnt titanium tailpipes

The 115 mm burnt titanium style outlets fill the rear diffuser beautifully, adding a high-end finish that complements the F40’s aggressive styling. The blue flamed tip aesthetic elevates the rear profile and makes your M135i look as serious as it sounds.

Why enthusiasts choose this rear exhaust for the M135i xDrive F40

• Direct-fit rear section for OPF and GPF equipped cars – keeps the particulate filter, upgrades sound and style
• Beautiful GT-115 burnt titanium tailpipe trims for a premium motorsport look
• T304 stainless construction for long life, strength and resistance to discolouration
• Mandrel-bent pipework for smooth flow and a crisp, sporty note
• Acoustically balanced to minimise cabin boom while enhancing character
• Designed, developed and hand finished in the UK by a leading exhaust specialist

Compatibility

BMW M135i xDrive F40 5 door, 2019 onwards, with OPF or GPF. This is a rear system that installs after the particulate filter and replaces the back section to enhance sound and aesthetics with GT-115 burnt titanium tips.

Installation

For professional fitting, choose MJ Modifications in Warwickshire. Our team knows these systems inside out and can supply and install with care. Request a fitting quote at info@mjmodifications.co.uk.

What you will notice

• A deeper, more engaging exhaust tone that suits daily driving and spirited use
• A premium, factory-plus appearance with eye-catching burnt titanium outlets
• Quality materials and precision build for long-term reliability

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