The Milltek Sport Large Bore Downpipe with Hi-Flow Sports Catalyst for the Mini Cooper S and JCW F55/F56 LCI models is engineered to deliver significant performance gains, sharper throttle response, and an enhanced exhaust tone, while retaining compatibility with the original OE exhaust system.
Manufactured with a larger diameter than the factory downpipe, this system allows exhaust gases to exit the engine more efficiently. The included Hi-Flow Sports Catalyst reduces back pressure while maintaining improved gas flow, resulting in noticeable gains in both power and sound quality.
This upgrade is designed specifically for LCI GPF/OPF-equipped vehicles and requires a Stage 2 ECU remap to perform correctly.
Key Features
Large-bore downpipe for increased exhaust flow
Hi-Flow Sports Catalyst for improved efficiency and sound
Designed for OE exhaust system compatibility
Optimised for LCI GPF / OPF-equipped vehicles
Motorsport-grade construction
Manufactured in the UK
Included Components
MSM359: Large Bore Downpipe with Hi-Flow Sports Catalyst (GPF Equipped Cars)
F5137: Adapter Sleeve Olive Connection (Flare to 70mm I.D., 65mm long)
Milltek Large Bore Downpipe with Hi-Flow Sports Catalyst for MINI F56 LCI
Technical Specifications
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Pipe Diameter: 76.20mm
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Estimated Fitting Time: 3–3.5 hours (including removal of OE system)
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Race Product: Yes
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E-Marked: No
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