Milltek Sport Large-Bore Catless De-Cat Downpipe for BMW M4 F82/F83 & M4 Competition (Non-OPF) Fits Milltek Cat-Back Only Requires 2x 18307851168 Coupe/Convertible

BMW M4 F82 F83 and M4 Competition pre-OPF Cat Delete Front Section by Milltek

Give your S55-powered M4 the exhaust upgrade it deserves. This Milltek catalyst-delete turbo outlet pipe frees up flow for faster spool, sharper throttle response and a harder-edged, motorsport tone. Precision fabricated in the UK from high quality T304 stainless, the enlarged diameter and smooth-radius bends help reduce back pressure for a real-world performance gain you can feel every time you drive.

We have installed this part on multiple customer builds at MJ Modifications and the feedback has been superb. Crisper response, stronger mid-range punch and that unmistakeable Milltek character when combined with the matching rear system. If you are searching for an M4 decat pipe, BMW F82 turbo down pipe, F83 front pipe, M4 Comp cat delete or S55 race pipe, this is the proven choice that enthusiasts in the UK trust.

Key reasons to choose this upgrade

• Big diameter turbo front section for improved gas velocity and reduced restriction
• Cat-delete configuration for maximum flow and a more aggressive, track-inspired soundtrack
• UK engineered and TIG welded T304 stainless for durability and corrosion resistance
• Built on precision jigs for an accurate fit when paired with the compatible Milltek rear system
• Designed to enhance response and mid-range torque on the S55 engine

Compatibility

• BMW M4 F82 Coupe
• BMW M4 F83 Convertible
• BMW M4 Competition without particulate filter pre-OPF, pre-GPF
• Pairs exclusively with Milltek cat back systems
• Installation requires 2 x 18307851168

Built for performance

Milltek’s UK-made pipework uses constant-radius bends and high-grade stainless to maintain flow and resist discoloration. The result is a clean, purposeful sound and improved drivability when used with the matching Milltek cat back.

Professional fitting

For hassle-free installation and setup, book your fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk and our team will take care of everything.

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Note: Cat-delete components are for off-road and motorsport use where permitted. Please check local regulations before purchase and installation.