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The COMP Cams CRB3 283Th R7 Thumper hydraulic roller cam, marketed as a Thumpr, targets high-performance street use. It works with a stock converter but shows its strengths with a 2000+ stall converter and appropriate gears; expect a choppy or thumping idle character. This cam supports aggressive street builds that pair intake, gearing and converter upgrades to capitalize on its profile.
COMP Cams Camshaft CRB3 283Th R7 Thumper
