What other modifications are recommended when installing this camshaft?

COMP Cams recommends a minimum of 9.0:1 compression, a 2500+ RPM stall speed torque converter for automatic transmissions, an upgraded intake manifold, appropriate rear axle gears, and performance headers to achieve the best results with this camshaft.

What is included in this COMP Cams Cam & Lifter Kit?

This kit includes the CL31-601-8 camshaft, a set of hydraulic roller lifters, assembly lube for proper installation and break-in, and COMP Cams decals.

What kind of idle can I expect with this camshaft?

This camshaft is designed for high performance street/strip use and will produce a noticeable, rough idle characteristic. This is typical for cams with these specifications and indicates the engine is set up for aggressive performance.

COMP Cams Cam & Lifter Kit CL31-601-8 for Ford Small Block

Name: COMP Cams Cam & Lifter Kit FS 291Th R7
Brand: COMP Cams
Price: 963.03 USD
Availability: InStock

COMP Cams Cam & Lifter Kit FS 291Th R7

$963.03

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams Mutha' Thumpr hydraulic roller cam and lifter kit for Ford 221-302 engines. Designed for high performance street/strip use.

Key Features

Fits Ford 221, 255, 260, 289, and 302 small block engines.
Hydraulic roller camshaft with 235° intake and 249° exhaust duration at .050" lift.
Designed for high performance street and strip applications.
Requires approximately 9.0:1 compression ratio for optimal performance.
Recommends a 2500+ RPM stall speed torque converter for automatic transmissions.
Kit includes camshaft, lifters, assembly lube, and decals.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

This COMP Cams Mutha' Thumpr camshaft and lifter kit is built around a hydraulic roller design, specifically tuned for Ford 221 to 302 cubic inch small block engines. The camshaft features a 235 degree intake and 249 degree exhaust duration at .050 inch lift, making it a strong choice for street/strip applications where improved performance is the goal.

To get the most out of this camshaft, COMP Cams recommends a minimum of 9.0:1 compression, a 2500 RPM stall speed torque converter if you're running an automatic transmission, and supporting modifications like an upgraded intake manifold, rear axle gears, and free-flowing headers. Expect a noticeable, rough idle characteristic that signals this cam is ready to work. The kit comes complete with the camshaft, hydraulic roller lifters, assembly lube to ensure proper break-in, and decals for your engine bay.

This kit is designed to fit a wide range of Ford vehicles, including popular models like the Ford Mustang, Fairlane, and Torino, as well as various LTD and Galaxie configurations from the 1960s through the early 1990s. It's a comprehensive package for enthusiasts looking to significantly enhance their engine's performance profile.