Modifications include a re-designed air intake, cooling system, higher compression Mahle pistons, twin-scroll Garrett turbos, a larger intercooler, new NGK spark plugs and revised ECU map.

Due to the higher torque output, the 8-speed automatic transmission, manufactured by ZF, uses stronger internals.

The B5 is fitted with M style control arms, with added camber and stiffer bushings to reduce understeer and enhance precision.

The Touring version uses rear air springs to maintain a stable ride height.

Options include a limited slip differential by Drexler, and higher performance composite brakes.

[4] Interior changes include higher quality Lavalina leather, wood trim, blue Alpina gauges and BMW Comfort seats.