Mutha' Thumpr 235/249 Hydraulic Flat Cam for Ford 351W. High performance street/strip, needs 9:1 compression, 2500+ stall, intake, Gears and headers, rough idle. High performance street/strip, needs...

For heavy cars with small c.i. Best for short tracks. Fits Ford Small Block Engines originally equipped with "Old" firing order and 351 Windsor engines with the "Windsor" firing order

More aggressive intake lobe, more torque. Good for sprint car. Fits Ford Small Block Engines originally equipped with "Old" firing order and 351 Windsor engines with the "Windsor" firing order

Street/Strip EFI 237/247 Hydraulic Roller Cam 331-363c.i. with 190-215cc head, 10:1-11:1 compression. Needs aftermarket intake, requires tuning. Fits Ford 5.0 and 351W w/ factory roller camshafts

Solid: Good for 1/4 mile to 3/8 mile tracks with high engine speed, great top end. Good for 1/4-3/8 mile tracks with high engine speed, great top end. Fits Ford Small Block Engines originally...

Street machine and limited high performance street use. Best with 4 speed or 2800+ stall and 3.40 to 4.10 gears, aftermarket intake and headers. Fits Ford Small Block Engines originally equipped with...

Mutha' Thumpr 235/249 Hydraulic Roller Cam High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle. Fits Ford Small Block Engines originally equipped...

Best torque in 406+c.i. Late Model or 355c.i. with 9:5.1+ compression. Fits Ford Small Block Engines originally equipped with "Old" firing order and 351 Windsor engines with the "Windsor" firing order

Mechanical Roller-Good on 3/8 to 1/2 asphalt track with tight corners. Good on 3/8-1/2 mile asphalt track with tight corners. Fits Ford Small Block Engines originally equipped with "Old" firing order...

Hydraulic: Great street/strip cam, 10:1 compression, headers, intake, Gears and 3000 stall. Very rough idle. Great street/strip cam. 10:1 compression, headers, intake, gears and 3000+ stall. Very...

Street/Strip EFI 243/253 Hydraulic Roller Cam 375-434c.i. with 200-225cc head, 10:1-11:1 compression. Needs single plane intake, requires tuning. Fits Ford 5.0 and 351W w/ factory roller camshafts

Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Ford 351W. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle. Street/strip, needs 9.5:1 compression,...