Cooper S 3-door
B48 / B46 (US)

Stage 1 is a software-only remap of the standard B48 and lifts the 3-door from 189–192 bhp and 280 Nm to 245–260 bhp with 360–400 Nm. Nothing needs fitting — the map is flashed through the OBD port — and the difference is felt everywhere, from throttle response to how hard the car pulls out of corners.

An intercooler, a decat or sports cat and an intake, with cooler spark plugs advised. With the stock turbo properly fed and cooled, Stage 2 takes the F56 to 270–285 bhp and 420–460 Nm. Samuel checks your exact parts list before writing the file, so the calibration matches what is actually bolted to the car.

Traction is the practical limit on any front-wheel-drive MINI, and the calibration is written with that in mind — torque is built progressively rather than dumped at once, which keeps the front axle hooked up in the lower gears. Good tyres and a sensible right foot do the rest; on the road the tuned F56 puts its power down surprisingly well.

A Stage 1 Cooper S comfortably outguns a standard JCW, so for most owners tuning is the cheaper route to the same pace. The caveat is internals: the Cooper S runs weaker pistons than the JCW, so if you eventually want JCW-plus power at Stage 3, forged pistons come first. Up to Stage 2 the standard engine is well within its limits.

You send Samuel your car's details, fuel grade and any fitted hardware, and a hand-calibrated file lands in your BM3, MHD or MG Flasher account within 24 hours. Flashing takes about 15 minutes on your driveway, your stock calibration is saved first, and revisions are included until the car drives the way you want.