COMP Cams Mutha Thumpr Hydraulic Roller Cam and Lifter Kits CL33-601-11 Camshaft Kits, Kits, Retro-fit, Advertised Duration 291/311, Lift 0.567/0.551, Ford, Big Block FE, Kit
COMP Cams Mutha Thumpr Hydraulic Roller Cam and Lifter Kits CL33-601-11 Camshaft Kits, Kits, Retro-fit, Advertised Duration 291/311, Lift 0.567/0.551, Ford, Big Block FE, Kit
Description
MTMPRHRCLFE
CL-KIT - Cam and Lifter Kit Includes: Camshaft, Lifters, Assembly Lube, Decals and Instructions.
Additional Information
High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.
Part Type
Engine Camshaft and Lifter Kit
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 21:16:09
Features
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Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Comp Cams, Comp Cams (edelbrock) |
| StreetFX SKU | ccaCL33-601-11 |
| SFX Item ID | 4776807 |
| Accounting SKU | cca-CL33-601-11 |
| Manufacturer SKU | CL33-601-11 |
| Manufacturer UPC | 036584381372 |
| Alternative References | CCA-CL33-601-11, CL33-601-11 |
Camshaft Kits, Mutha Thumpr Hydraulic Roller Cam and Lifter Kits, Retro-fit, Advertised Duration 291/311, Lift 0.567/0.551, Ford, Big Block FE, Kit
COMP Cams offers Mutha Thumpr hydraulic roller cam and lifter kits for a variety of applications, including many Ford and Oldsmobile engines from the 1960s, '70, '80s, and '90s. These rough-idle replacements are ideal for high performance street/strip use. They need 9:1 compression, 2,500+ stall, intake, gears and headers. Kit includes camshaft, lifters, assembly lube, decals and instructions. Get the sound and performance you want with COMP Cams products.
• Product background info:
Frequently used in today's OEM factory engines and mild to moderately aggressive performance engines, hydraulic roller cams use lifters equipped with a roller wheel that tracks along the camshaft lobe, reducing wear and friction, and enabling faster lobe ramp rates than flat tappet cams.
| Product Attributes | |
|---|---|
| Brand | COMP Cams |
| Manufacturer's Part Number | CL33-601-11 |
| Part Type | Camshaft Kits |
| Product Line | COMP Cams Mutha Thumpr Hydraulic Roller Cam and Lifter Kits |
| UPC | 00036584381372 |
| Cam Style | Hydraulic roller, Retro-fit |
| Basic Operating RPM Range | 2,200-5,900 |
| Camshaft Use | Street/Strip |
| Camshaft Manufacturers Description | High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle. |
| Intake Duration at 050 inch Lift | 235 |
| Exhaust Duration at 050 inch Lift | 249 |
| Duration at 050 inch Lift | 235 int./249 exh. |
| Advertised Intake Duration | 291 |
| Advertised Exhaust Duration | 311 |
| Advertised Duration | 291 int./311 exh. |
| Intake Valve Lift with Factory Rocker Arm Ratio | 0.567 in. |
| Exhaust Valve Lift with Factory Rocker Arm Ratio | 0.551 in. |
| Valve Lift with Factory Rocker Arm Ratio | 0.567 int./0.551 exh. |
| Camshaft Gear Attachment | 1-bolt |
| Grind Number | 291tHR7 |
| Computer-Controlled Compatible | No |
| Lifters Included | Yes |
| Lifter Style | Hydraulic roller |
| Valve Springs Included | No |
| Retainers Included | No |
| Locks Included | No |
| Valve Stem Seals Included | No |
| Timing Chain and Gears Included | No |
| Assembly Lubricant Included | Yes |
| Pushrods Included | No |
| Rocker Arms Included | No |
| Gaskets Included | No |
| Valve Springs Required | Yes |
| Quantity | Sold as a kit. |
Brochures
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