The APR Stage 1 ECU Upgrade is the first step towards making more power! This simple upgrade requires no engine hardware modifications, and produces 477-542 HP with 465-546 FT-LBS of torque, depending on octane. Gains as high as 80-137 HP and 97-171 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.