COMP Cams 91-602-5 Thumpr Hydraulic Camshaft, Buick 364/401/425
Hydraulic Flat Tappet Camshaft Type, 2500 to 6400 RPM Range, 295 Intake Duration
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Buick Nailhead 364, 401, 425 c.i. 8 cyl. 1957-1966. Hydraulic - Big Mutha' Thumpr - Street/strip, must have head modification, 2500+ stall, very rough idle. Thumpr Hydraulic Flat Tappet Camshafts. 3 grinds to fit all of your performance needs. Unique design. Maximizes sound and mid to high RPM power. Ensures safe piston-to-valve clearance. Proven to generate 25+ RWHP gains. Does not compromise durability.
- Three unique cam designs for each application that deliver excellent horsepower gains & broad torque curve; perfect choice for muscle cars & street rods
- Early intake valve opening & long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note
- Best with aftermarket converters & more rear gear
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Q & A
What happens when you advance or retard a camshaft? In this tech article, we explain the pros and cons of installing your cam straight up, advancing or retarding.
Learn the basics to engine performance like; how does a cam work? What is Valve lift, duration, lobe separation angle, and cam profiles? Afterwords selecting the right camshaft will be less of a guessing game!