Mechanical Roller-Ultimate pro street cam. 4000+ stall or 4 speed, 11:1 compression, radical Race idle.

Mechanical Roller-Excellent power for street use. 3000+ stall with low Gear and headers. Rough idle.

Hydraulic Roller: Street/Strip only. 4 speed or 3000 stall and 4.10 or lower Gear. Higher compression, aftermarket intake and headers.

Solid-Excellent torque for heavy cars, 3500+ stall or 4 speed with 10.5:1 compression.

Fits Ford 351 Cleveland, 351 Modified, 351 Cobra-Jet, Boss 351, 400 Modified

Street/ strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.

Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early...

High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.

Mutha' Thumpr 234/249 Hydraulic Flat Cam for Ford 351C, 351M-400M. High performance street/strip, needs 9:1 compression, 2500+ stall, intake, Gears and headers, rough idle.

Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early...

Thumpr 226/241 Hydraulic Flat Cam for Ford 351C, 351M-400M. High performance street, stock converter ok, best with 2000+ converter and Gears. Choppy/thumping idle.

Hydraulic Roller: Perfect for street machine. Best with 4 speed and 3.40-4.10 Gears. Aftermarket intake, headers and mild converter.

Solid: Outstanding power and modern tight lash with Ford 271 HP 289 Cam character.

Hydraulic: Sound of Ford 271 HP 289 Cam with hydraulic lifters and increased performance.

Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Ford 221-302. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle.

Mutha' Thumpr 235/249 Hydraulic Flat Cam for Ford 221-302. High performance street/strip, needs 9:1 compression, 2500+ stall, intake, Gears and headers, rough idle.

High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.

Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early...

High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle.

An older member of the COMP Cams grind family, the Magnum series of camshafts offers excellent performance gains over stock without the added wear and tear associated with more aggressive camshafts. Ideal for use with higher compression ratio engines...