APR - Performance ECU Software - 4.2L EA824 V8 (RS4) turbo Forward Hole - 25% increase

Forward Hole - 25% increase over stock GTI 24mm bar

95 APR Stage 1+ APR Stage 1+ ECU Upgrade $399

Delivers up to 530-627 HP with 506-533 FT-LBS of torque (APR Stage 3)

The Active Autowerke M340i/M440i rear exhaust was carefully engineered to eliminate the overly quiet sound of the factory M340i and M440i exhaust

4 - Bevel Box Bolt

APR - Performance ECU Software - 4.2L EA824 V8 (RS4) turbo Forward Hole - 25% increaseAPR's ECU Upgrades are the best dollar per horsepower modification one can make to improve engine performance. The upgrades dramatically increase horsepower and torque, making for an exceptionally quicker and more exciting vehicle. This is made possible through APR's optimization of the factory engine management system to take full advantage of the engine's capabilities, without needing any end user adjustment. The ECU Upgrades are available with