Milltek Sport Stainless Steel Secondary Cat Delete Bypass Pipes for BMW M3 F80 & M3 Competition Saloon (2014-2018, Non-OPF/GPF) - Fits Milltek Cat-Back Only;

BMW F80 M3 Secondary Catalyst Bypass Pipes - Milltek Sport SSXBM1032

Unlock a harder-hitting soundtrack and improved exhaust flow on your F80 chassis with Milltek Sport’s secondary catalyst bypass pipes, part number SSXBM1032. Engineered for the S55-powered BMW M3 Saloon including Competition models from 2014 to 2018, these mid-section pipes are a direct bolt-on that replace the restrictive secondary catalysts with free-flowing T304 stainless steel tubing. Hand-finished in the UK, they deliver a sharper, more vocal tone and enhanced response when used with a Milltek rear system.

Why this upgrade

• Crafted from aerospace-grade T304 non-magnetic stainless steel for durability and corrosion resistance
• Mandrel-bent pipework with optimised diameter for smoother gas velocity and reduced backpressure
• Clean, precise fit backed by Milltek’s UK development and acoustic tuning
• Transforms the M3’s character with a deeper, more aggressive exhaust note
• Track-focused secondary decat solution from a leading UK exhaust specialist

Compatibility

• Vehicle: BMW M3 F80 Saloon and M3 Competition F80
• Years: 2014, 2015, 2016, 2017, 2018
• Emissions hardware: for pre-OPF and pre-GPF cars only
• Exhaust system pairing: designed to connect to a Milltek Sport cat-back only
• Front section: works with factory primary downpipes or Milltek primary downpipes
• Part number: SSXBM1032

What you will hear and feel

By removing the secondary catalysts, these straight-through centre pipes let the S55 breathe more freely. Expect a more pronounced, motorsport-inspired tone with added depth and clarity, plus a crisper throttle response when combined with the correct Milltek cat-back. The result is a more engaging drive without compromising fit or finish.

Milltek’s constant-radius bends help maintain consistent flow, while the robust 304-grade stainless construction resists discolouration and stands up to repeated heat cycles. It is a premium, UK-made mid-pipe upgrade that complements Milltek’s rear sections perfectly.

Our experience

We have fitted and used SSXBM1032 on customer F80 builds and feedback has been excellent. Owners love the uplift in sound quality and the OEM-plus fitment. It is a proven secondary decat midsection for enthusiasts who want a cleaner, louder M3 tone from a brand they can trust.

Installation

Direct bolt-on to a compatible Milltek cat-back. Professional fitting recommended. For installation, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Legal notice

For off-road or track use where removal or modification of emissions equipment is permitted. Not suitable for OPF or GPF vehicles. Not compatible with non-Milltek cat-back systems.

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Part number: SSXBM1032