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The COMP Cams LS1 291T Big Mutha' Thumpr hydraulic roller cam is built for street/strip power and requires approximately 9.5:1 compression, a 2800+ rpm stall converter, intake, gears and headers. Expect a very rough idle; this profile targets strong upper‑end output for aggressive builds that include the recommended supporting components and tuning.
COMP Cams Camshaft LS1 291T HR-109 BMT
