We include rolling road power runs, free of charge with every APR remap at our facility in Sheffield.
We also operate a 30-Day Money Back Guarantee.

Standard performance figures:
Power: 330 bhp
Torque: 295 lb/ft

Expected remapped performance figures:
Power: 340 bhp
Torque: 302 lb/ft

APR is pleased to present the ultimate engine control unit (ECU) upgrade for the 4.2L V8 engine. APR’s ECU upgrade is available in octane-specific variations and is conveniently flashed to the vehicle’s factory ECU through the OBD-II port without any physical modification to the factory ECU. APR’s EMCS functionality puts the control of the engine’s operation at your fingertips and allows for additional features and options to be installed to the OEM ECU.

The ECU’s Bosch Motronic ME7 engine management system is responsible for proper operation of the engine during constantly changing environmental and load conditions. With built in compensational data for environmental variables and varying load conditions, the factory ECU is far more complex and intelligent than units found in other vehicle makes and marques.

APR’s Calibration Engineers spent months calibrating the engine management system, including many hours of chassis dyno development. With a thorough understanding of the ECU’s torque structure, APR’s Calibration Engineers properly increased engine load to produce more power and torque across the entire power band. APR’s ECU Upgrade optimises ignition timing, lambda and more to produce higher output. Using APR’s proprietary high-speed data logging suite, the calibration team closely monitored the effects of these changes to help ensure an enjoyable driving experience.