The outstanding sound of COMP Cams® Thumpr™ Cams is now available for your LS engine! COMP Cams Thumpr LS Camshaft Packages come as a complete valve train 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 HP and dependability, as well as creating that wildly popular Thumpr™ sound in GM LS applications. These Thumpr™ Camshaft Packages can add anywhere from 60 to 110 HP (depending on the application). These packages will make you "Hated By Neighbors, Envied By Friends." COMP Cams Thumpr LS Camshaft Packages Include: - Thumpr LS Camshaft - Pushrods - Valve Springs - Retainers - Valve Locks - Spring Seats - Valve Seats

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