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The COMP Cams LS1 283T Mutha' Thumpr hydraulic roller cam is a street/strip profile that requires about 9:1 compression, a 2500+ rpm stall converter, intake, gears and headers. It delivers aggressive behavior with a rough idle and is intended for builds that pair the cam with supporting drivetrain and induction upgrades to realize its mid‑to‑upper RPM performance.
COMP Cams Camshaft LS1 283T HR-109 MT T
