Suitable for M57 engines - 184hp 193hp 163hp M57D30/D25 into E36 chassis. This kit includes: - ECU - Simplified wiring - Gas pedal Simplified wiring includes: Ecu plug Gas pedal plug Obd2 plug X20 (round plug) Out for reverse light Out for starter activation Out for OBD2 ground (earth ring) Out +12v to fuel pump Inside round plug: RPM Oil pressure lamp Alternator lamp ECU switched +12v Fuel pump relay Reverse light Starter activation Total lenght ECU-OBD / ECU-GAS PEDAL - 2m Note: Wirings may have differences from the photo shown but same placement.