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Reference Information

Camshaft Kits, Thumpr LS Camshaft Packages, Hydraulic Roller Tappet, 280 Int./299 Exh. Advertised Duration, Pushrods, Chevrolet, 4.8L, 5.3L, 6.0L, Kit

COMP Cams Thumpr LS camshaft packages come as a complete valvetrain parts package that is matched for specific LS applications and desired performance. COMP Cams engineers have spent countless hours testing and creating valve train component combinations that are perfectly matched for maximum horsepower and dependability, as well as creating that wildly popular Thumpr sound in GM LS applications. Thumpr camshaft packages can add anywhere from 60 to 110 hp (depending on the application).

COMP Cams Thumpr LS camshaft packages include:
• Thumpr LS camshaft
• Pushrods
• Valve springs
• Retainers
• Valve locks
• Spring seats
• Valve seats