![Comp Cams Stage 2 Thumpr 227/237 Hydraulic Roller Camshaft Kit (07-19 6.0L Sierra 3500 HD)](https://www.americantrucks.com/image/comp-cams-sierra3500-stage-2-thumpr-227-237-hydraulic-roller-camshaft-kit-ck54-703-11.CT17800.jpg?obj=car&wid=640&hei=480&sharpen=1)
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Description, Q&A
Description. 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).
Fitment:
Comp Cams CK54-703-11
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