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The COMP Cams Big Mutha’ Thumpr 243/257 hydraulic flat cam is built for aggressive street/strip Ford 351W builds, requiring about 9.5:1 compression and a 2800+ stall converter. It benefits from intake, gears and headers to unlock its power but yields a very rough idle. This cam is intended for drivers prioritizing strong midrange and top‑end output over smooth low‑speed behavior.
COMP Cams Camshaft FW 295T H-107 BMT Th
