MMR High Flow Valved Exhaust System for Mini Cooper S JCW B48 F56 F55 F54 2013-2019 - MMR26-1401 - The MMR Performance high-flow exhaust system for the Mini JCW F56 unlocks power, provides a perfect rich sound quality and improves aesthetics, all whilst giving the driver the option to control the exhaust valve with the push of a button. Available as either a downpipe, cat-back or complete system. The cat-back system uses enlarged 2.75" pipework to provide a freeer flowing path for exhaust gasses to follow, whilst the carefully designed centre resonator and rear muffler offer less of a restriction compared to the OE system, but still give the F56 Mini its addictive exhaust note. The addition of an exhaust valve delivers the best of both worlds, allowing you to easily switch between a more docile soundtrack and one that unleashes the true dynamic tone and sound level that's just waiting to get out, all conveniently activated from a push of a button on the supplied key-fob. Finishing the cat-back system, which can be joined to the OE downpipe as a standalone rear section, are a pair of beautifully manufactured twin carbon fibre trims, complete with MMR logos. The 3" downpipe removes the native restriction in the OE equivalent, but with the addition of our 300-cell sports catalyst further reduces back-pressure and improves performance. The pipework is coated in the latest heat shielding technology to help keep unwanted heat away from your engine bay and improve exhaust gas speed internally. The MMR Performance Exhaust System is available as either a downpipe, valved cat-back or complete system and is supplied with everything you need for installation, including clamps, valve motor assembly, wiring loom and two key-fobs. Applications Series  Model Code  Year Variant  Engine Codes  Mini F56/F55/F54 2013 - 2019 Cooper S, JCW B48