Edelbrock Supercharger Stage 1 - Street Kit 2009-2013 GM Gmt900 Trucks 6 2L w/ o TunerThe Edelbrock supercharger Stage 1 Street system part #15790 for 2007 13 Silverado and Sierra 1500 increases the performance of your 6. 2L Gen IV engine to 407 horsepower and 434 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 for maximum flow, minimum temperature rise and quiet