This is a comprehensive tuning package for the BMW Z4 35i (E89), equipped with the potent twin-turbo inline-6 engine and a Siemens MSD8x series ECU. This package provides a full upgrade path, containing both Stage 1 and Stage 2 calibrations to suit your vehicle's hardware and performance goals.
The Stage 1 file delivers a thrilling performance increase on a completely stock car, dramatically improving acceleration and throttle response for an enhanced daily driving experience.
The Stage 2 file is a high-performance calibration for modified vehicles, requiring upgraded downpipes and a larger intercooler. This tune maximizes the engine's potential, providing aggressive power delivery suitable for the racetrack and spirited driving, turning your Z4 into a true performance machine.