Edelbrock 15890 Stage 1 Supercharger Kit for 2010 Mustang GT 4.6L 3V W/O TuneEdelbrock Stage 1 Supercharger Kit #15890 For 2010 Mustang GT 4. 6L 3V W O Tune The Edelbrock supercharger Stage 1 Street system part #15890 for 2010 Mustangs increases the performance of your 4. 6L 3V engine to 466 horsepower and 439 ft lbs of torque at the crank when used with Edelbrock tune (kit supplied without a programmer). The core of this system is the Eaton Gen VI 2300 TVS rotating assembly with a four lobe design with 160 degrees of twist