1985 - 1988 BMW E34 535i E24 635csi E32 735i Ecu # 0 261 200 179 (check to see if this matches your ecu code!) PEAK HORSEPOWER +24 HP PEAK TORQUE +29 LBS/FT NEW REV LIMITER 6600 RPM Performance Chip unleashes more power by re-programming the fuel mixture and ignition timing parameters of the engine management system. Furthermore, the software safely raises the rev-limit, giving your BMW a broader power band and greater road speed potential in each gear. Significant gains are also achieved at part throttle, making extra power available where you spend the bulk of the time driving. The top speed governor has also been eliminated, enabling the vehicle to achieve its top speed.

Ecu # 0 261 200 179 (check to see if this matches your ecu code!)