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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.

Classic Mutha' Thumpr 227/241 Hydraulic Flat Cam Buick 364, 401, 425 Nailhead; High performance street/strip, head modification recommended to raise RPM limit, 2200+ stall, rough idle.

Mutha' Thumpr 227/241 Hydraulic Flat Cam for Buick 350; High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.

Mutha' Thumpr NSR 234/254 Hydraulic Roller Cams for Ford 4.6/5.4L Modular 3-V; Very rough idle, biggest cam for stock heads. Great power above 4900 RPM. Compatible with stock valve springs, benefits from converter and gears, requires cam phaser upgrade and custom tuning.

Mutha' Thumpr 235/249 Hydraulic Roller Cam for Chevrolet Big Block GEN VI; High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.

Mutha' Thumpr 235/249 Hydraulic Flat Cam for Chrysler 383-440; High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.

Mutha' Thumpr 235/249 Hydraulic Flat Cam for Pontiac 265-455; High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.

Mutha' Thumpr 234/249 Hydraulic Flat Cam for Cadillac 425, 472, 500; High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.

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.

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