5.3L/6.0L Chevrolet/GMC truck. Significant gains in mid and upper RPM range. Exhaust upgrade needed for best performance. Needs programmer.
Fits 4.8, 5.3, 5.7, 6.0, 6.2 and 7.0 Liter LS1, LS2, LS3, LS4, LS6, LS7 plus SUV and Truck Engines (Grinds are specific to displacement and cylinder head design)
