What kind of idle can I expect with this camshaft?

This is the Big Mutha' Thumpr camshaft, and it's designed to produce a very rough, noticeable idle. This aggressive idle is characteristic of performance cams intended for street/strip use.

What other modifications are recommended for this kit?

COMP Cams recommends a minimum of 9.5:1 compression, a 2800+ RPM stall speed torque converter for automatic transmissions, and upgraded intake, gears, and headers to get the most out of this camshaft kit.

Can this camshaft be shipped to California?

No, this camshaft is not CARB approved and cannot be shipped to California due to emissions regulations.

COMP Cams Camshaft and Lifter Kit CL31-602-8

Name: COMP Cams Cam & Lifter Kit FS 299Th R7
Brand: COMP Cams
SKU: comp-cams-comp-cams-cam-lifter-kit-fs-299th-r7-t14-4395826
Price: 914.29 USD
Availability: BackOrder

COMP Cams Cam & Lifter Kit FS 299Th R7

$914.29

On Backorder

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

COMP Cams Cam & Lifter Kit FS 299Th R7. For Ford 221-302 engines, this hydraulic roller kit offers a very rough idle for street/strip use.

Key Features

Fits Ford 221, 255, 260, 289 and 302 Small Block engines.
Includes camshaft, hydraulic roller lifters, assembly lube, decals, and instructions.
Designed for street/strip use with a very rough idle.
Requires 9.5:1 compression, 2800+ stall speed, intake, gears, and headers for optimal performance.
Hydraulic roller camshaft design.

⚠️ 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

COMP Cams is well-known for performance camshafts and valvetrain components. This Big Mutha' Thumpr hydraulic roller camshaft and lifter kit is designed for Ford 221, 255, 260, 289, and 302 small block engines. It's built for street/strip applications and is intended for builders who want a very noticeable, rough idle that signals serious performance.

This kit includes the camshaft, hydraulic roller lifters, assembly lube, decals, and instructions, so you have the core components needed to get started. To get the most out of this cam, COMP Cams recommends a minimum of 9.5:1 compression, a 2800+ RPM stall speed torque converter if you have an automatic transmission, and upgraded intake, gears, and headers. The rough idle is a direct result of the aggressive camshaft profile, which is designed to maximize airflow and power in the upper RPM range.

This kit fits a wide range of Ford vehicles, including popular models like the 1965-1973 Ford Mustang, 1963-1970 Ford Fairlane, and 1972-1974 Ford Gran Torino. It's important to note that this camshaft is not CARB approved and cannot be shipped to California. Always refer to the included instructions for proper installation and break-in procedures.