COMP Cams Thumpr Retrofit Hydraulic Roller Cam and Lifter Kits CL51-600-11 Lifters, Thumpr, Tappet, Advertised Duration 283/303, Lift .513/.498, Pontiac V8, Kit
COMP Cams Thumpr Retrofit Hydraulic Roller Cam and Lifter Kits CL51-600-11 Lifters, Thumpr, Tappet, Advertised Duration 283/303, Lift .513/.498, Pontiac V8, Kit
Description
T 227/241 HRCLPont
CL-KIT - Cam and Lifter Kit Includes: Camshaft, Lifters, Assembly Lube, Decals and Instructions.
Additional Information
High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle.
Application Summary
Pontiac 265-455 V8
Part Type
Engine Camshaft and Lifter Kit
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 21:16:12
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 | ccaCL51-600-11 |
| SFX Item ID | 4776993 |
| Accounting SKU | cca-CL51-600-11 |
| Manufacturer SKU | CL51-600-11 |
| Manufacturer UPC | 036584382157 |
| Alternative References | CCA-CL51-600-11, CL51-600-11 |
Cam and Lifters, Thumpr, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .513/.498, Pontiac V8, Kit
Musclecar sound is back and nastier than ever with these Thumpr retrofit hydraulic roller cam and lifter kits from COMP Cams! These cams feature a thumping high performance idle and provide significant horsepower and torque increases. Specially engineered profiles are offered for each unique engine, providing the perfect combination of an early intake valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize your engine's nasty-idling characteristics without negatively impacting streetability. These kits include high-quality matched lifters for unbeatable performance, durability, and ease of installation.
| Product Attributes | |
|---|---|
| Brand | COMP Cams |
| Manufacturer's Part Number | CL51-600-11 |
| Part Type | Camshaft Kits |
| Product Line | COMP Cams Thumpr Retrofit Hydraulic Roller Cam and Lifter Kits |
| UPC | 036584382157 |
| Cam Style | Hydraulic roller, Retro-fit |
| Basic Operating RPM Range | 1,700-5,500 |
| Camshaft Use | Street/Strip |
| Intake Duration at 050 inch Lift | 227 |
| Exhaust Duration at 050 inch Lift | 241 |
| Duration at 050 inch Lift | 227 int./241 exh. |
| Advertised Intake Duration | 283 |
| Advertised Exhaust Duration | 303 |
| Advertised Duration | 283 int./303 exh. |
| Intake Valve Lift with Factory Rocker Arm Ratio | 0.513 in. |
| Exhaust Valve Lift with Factory Rocker Arm Ratio | 0.498 in. |
| Valve Lift with Factory Rocker Arm Ratio | 0.513 int./0.498 exh. |
| Camshaft Gear Attachment | 1-bolt |
| Grind Number | 283THR7 |
| 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 | No |
| Pushrods Included | No |
| Rocker Arms Included | No |
| Gaskets Included | No |
| Valve Springs Required | Yes |
| Quantity | Sold as a kit. |
Brochures
Compatibility
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