COMP Cams 1500CPG Shaft-Mount Aluminum 1.7 Ratio Rocker Kit for GM LS1, LS2 and LS6

Replacing traditional stud-mount rocker systems, the COMP Cams 1500CPG is a shaft-mount rocker arm system designed to increase valve train stability and performance on LS-series engines. Fits 156 Buick, Cadillac, Chevrolet, GMC and 4 other makes vehicles from 1999 to 2019 with the 5.3L V8, 6.0L V8 and 4.8L V8, including the 2003-2005 and 2010-2019 Chevrolet Express 2500 Base and Express 2500 LS and GMC Savana 2500 Base and the 2010-2019 Chevrolet Express 2500 LT, Express 3500 Base, Express 3500 LS, Express 3500 LT, Silverado 2500 HD LT, Silverado 2500 HD LTZ, Silverado 2500 HD WT, Silverado 3500 HD LT, Silverado 3500 HD LTZ and Silverado 3500 HD WT and GMC Savana 2500 LS, Savana 2500 LT, Savana 3500 Base, Savana 3500 LS, Savana 3500 LT, Sierra 2500 HD SLE, Sierra 2500 HD SLT, Sierra 3500 HD SLE and Sierra 3500 HD SLT. Full vehicle list below. Built from 2024 aluminum rockers mounted on an 8620 hardened steel shaft, this system replaces the traditional stud-mounted design with a horizontal shaft that serves as the fulcrum, significantly increasing mounting stiffness and valve train stability. The 1.7 ratio rockers efficiently transfer camshaft power to the valves with zero offset on both intake and exhaust sides. Installation requires a valve cover spacer, baffle removal, or aftermarket valve covers.

• Rocker Stud Diameter: Shaft
• Engine Family: LS1/LS2/LS6
• Exhaust Offset: 0 IN
• Exhaust Rocker Arm Ratio: 1.7
• Intake Offset: 0 IN
• Intake Rocker Arm Ratio: 1.7
• Rocker Arm Material: 2024 Aluminum
• Rocker Arm Series: Shaft-Mount Aluminum
• C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: Yes, but must be a race/competition only vehicle.
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