Milltek Large Bore Downpipes and Hi-Flow Sports Cats for BMW M4 F82 F83 Coupe and Convertible including M4 Competition
Unlock more performance and an aggressive, refined soundtrack with Milltek Large Bore Downpipes and Hi-Flow Sports Cats for the BMW M4 F82 and F83. This premium Milltek Sport exhaust upgrade is engineered in the UK for serious enthusiasts who want better flow, faster response and a sharper, sportier tone without drone. Perfect if you are upgrading your BMW M4 exhaust and want proven quality, durability and performance.
Every Milltek system is designed, developed and hand-finished in the UK by time-served craftsmen using aerospace grade type 304, non-magnetic stainless steel. This material resists discolouration and corrosion and is used throughout the pipework, silencers and hardware for long-lasting reliability. Mandrel-bent, large bore tubing maintains a constant radius for optimised gasflow, while the carefully increased diameter supports significant performance gains without sacrificing mid-range torque. Milltek’s comprehensive acoustic development delivers a crisp, motorsport-inspired note without NVH, drone or cabin resonance.
Why choose Milltek downpipes and sports cats for your BMW M4
- Large bore downpipes with Hi-Flow Sports Cats for improved exhaust gas flow and performance potential
- UK-made in aerospace grade type 304 stainless steel for exceptional durability and corrosion resistance
- Mandrel-bent tube for smooth, constant-radius bends and optimised gas velocity
- Sporty, crisp exhaust tone engineered to avoid drone and unwanted cabin resonance
- Designed specifically for BMW M4 F82 and F83 Coupe and Convertible, including M4 Competition
Fitment and requirements
- Fits with Milltek Sport cat-back system only
- Requires Lambda Extensions
- Requires 2 x 18307851168 for installation (available from your local BMW dealer)
- Model compatibility: BMW M4 F82 F83 Coupe and Convertible, including M4 Competition
What you can expect
Expect freer breathing for the turbo system, quicker exhaust flow and a stronger, more engaging exhaust note. Whether you are building a fast road BMW M4 or preparing for track days, these Milltek downpipes and sports cats are a high quality, performance-focused upgrade that complements tuning while keeping everyday driving perfectly civilised.
Proven by us and trusted by our customers
At Nforcd we have fitted these Milltek Large Bore Downpipes and Hi-Flow Sports Cats to customer M4s and the feedback has been consistently positive. Customers love the sharper throttle response, the improved mid-range pull and the purposeful, refined sound with no intrusive drone.
Installation and support
Professional fitting is recommended. For installation at Nforcd in Warwickshire, request a quote via Sales@nforcd.com and our team will be happy to help.
Search-friendly terms
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Additional notes
Please check local regulations regarding emissions compliance. For any fitment questions or to confirm compatibility with your setup, contact Sales@nforcd.com.
Additional BMW parts required: 2 x 18307851168