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COMP Cams 20-600-9 Thumpr 227/241 Hydraulic Roller Cam for Chrysler 273-360
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Enter your Engine Family Number and we will confirm whether this exact converter is street-legal for your vehicle.
High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle.
Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes.
Specifications
| Camshaft Series | Thumpr |
| Usage | Street/Performance |
| Cam Type | Hydraulic Roller |
| Grind Number | 283THR7 |
| Basic Operating RPM Range | 1,900-5,600 R3 |
| Intake Duration at .050 Inch Lift | 227 DD |
| Exhaust Duration at .050 inch Lift | 241 DD |
| Advertised Intake Duration | 283 DD |
| Advertised Exhaust Duration | 303 DD |
| Lobe Separation | 107 DD |
| Intake Valve Lift | 0.513 IN |
| Exhaust Valve Lift | 0.498 IN |
| Lifters Included | No |
| Valve Springs Required | Yes |
| Assembly Lubricant Included | No |
| Camshaft Gear Attachment | 1-Bolt |
| Camshaft Material | Billet Steel |
| Engine Family | Chrysler 273-360 c.i. 8 Cylinder (1964-2002) |
| Cam and Lifter Kit Upgrade | CL20-600-9 |
| K-Kit Upgrade | K20-600-9 |
| Lifter Type | Hydraulic Roller |
| Grind Number | 283THR7 |
⚠️ California Proposition 65 Warning
California Residents: This product can expose you to chemicals which are known to the State of California to cause cancer or other reproductive harm. Please visit www.p65warnings.ca.gov for more information.
Warranty: 12 Months
Please check the product description for the manufacturer’s application details, or ask a specialist — we’ll confirm whether it fits your vehicle before you buy.
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Shipping: Free to the USA.
Orders are processed during normal business days. Delivery dates may vary by carrier and destination.
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