The APR Stage 1 ECU Upgrade is the first step towards making more power! This simple upgrade requires no engine hardware modifications, and produces 520-615 HP with 524-594 FT-LBS of torque, depending on octane. Gains as high as 67-152 HP and 91-160 FT-LBS of torque are available throughout the power band. To get more power, the vehicle can be outfitted with an upgraded intake, cooling, or exhaust system. With additional cooling, we measured 565-648 HP with 548-594 FT-LBS of torque with gains as high as 107-185 HP with 115-160 FT-LBS of torque is available throughout the power band.