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The COMP Cams Mutha’ Thumpr 235/249 hydraulic roller cam offers a robust street/strip profile for Ford 351W engines, favoring increased breathing and midrange punch. It performs best with 9:1 compression, a 2500+ stall converter and supporting hardware such as intake and headers. Buyers should expect a rough idle as the tradeoff for stronger torque and more aggressive on‑throttle performance.
COMP Cams Camshaft FW 291T HR-107 MT Th
