Borla exhaust system.

EXCEPT John Cooper Works. Borla® Cat-Back™ and Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive Borla® Sound of Power respected by motoring enthusiasts everywhere. Ultra-smooth mandrel bends ensure maximum flow o power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Give your Cooper S the sound and power it deserves, bolt on a Borla®. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

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