COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B
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InfoCOMP Cams Big Mutha Thumpr 299THR-7 Hydraulic Roller Camshaft for Small Block Chrysler.
Thumpr Retro-Fit Hydraulic Roller Camshafts. Hydraulic Roller-(Big Mutha' Thumpr) Street/strip, needs 9.5:1 CR , 2800+ stall, intake, gears, and headers, very rough idle. 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
Application1971-89 Chrysler 318-360
1964-89 Plymouth 273-360
1964-91 Dodge 273-360
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