Truck Cam Kit 31218132 for Chevrolet Silverado2500 Silverado1500 GMC Sierra1500 Sierra2500 Replace Part Number:BTR31218110, 31218132 Specification:1.The Kits are an excellent selection for GM trucks and SUV s equipped with 4.8L, 5.3L, 6.0L, or 6.2L engines. These camshafts are designed to increase power without sacrificing low-end torque and are great choice for heavier vehicles such as Silverado, Sierra, Yukon, Tahoe, Suburban, Escalade, etc.2.It were designed with low lift so standard beehive springs and OE pushrods can be used, making these the most affordable truck cams available.3.The stage II cam has more of a noticeable idle, with even more average torque production than the stage I cam, at the sacrifice of some low end torque and fuel mileage.4.This is the largest cam we recommend to run with stock 4L60E converter in a 4.8L/5.3L.Application:Fit For Chevrolet Vehicle: Silverado 2500, 2004, 2006-2007 Silverado 1500, 2003-2006 Tahoe, 2002-2006 Fit For Cadillac Vehicle: Escalade, 2002-2006 Fit For GMC Vehicle: Sierra 1500, 2002-2006 Sierra 2500, 2002 Content:16X LS6 Beehive (.560" lift) valve spring kit or LS6 valve spring kit16X LS Hat Valve Seals1X Stage II Camshaft Specs (BTR31218110): 212/218 .553"/.553" 111