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COMP Cams 21-243-4 Magnum 253/253 Hydraulic Flat Cam for Chrysler 383-440
This part fits specific vehicles. Select your vehicle to check the fit. You can still add it to your cart.
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Enter your Engine Family Number and we will confirm whether this exact converter is street-legal for your vehicle.
Pro Street. 383 needs 3500-3700+ stall. 440 needs 3000-3300+ stall. 850 CFM carb, 10:1+ compression. Headers and good int, 3.90-4.30 gear.
An older member of the COMP Cams grind family, the Magnum series of camshafts offers excellent performance gains over stock without the added wear and tear associated with more aggressive camshafts. Ideal for use with higher compression ratio engines that need to bleed off compression, the magnum series performs its best when static compression is 9.5:1+ and with an aftermarket higher stall torque converter. Delivering excellent high RPM power, while not needlessly abusing valve train parts, the Magnum grind family is the perfect choice for performance engines equipped with mild ratio rocker arms and traditional performance valve springs.
Specifications
| Camshaft Series | Magnum |
| Usage | Street/Strip |
| Exhaust Valve Lift | 0.525 IN |
| Intake Valve Lift | 0.525 IN |
| Camshaft Gear Attachment | 1 |
| Camshaft Gear Attachment | 1-Bolt |
| Lobe Separation | 110 deg |
| Exhaust Duration at .050 inch Lift | 253 deg |
| Intake Duration at .050 Inch Lift | 253 deg |
| Basic Operating RPM Range | 3,500-6,500 RPM |
| Advertised Exhaust Duration | 305 deg |
| Advertised Intake Duration | 305 deg |
| Grind Number | 305H |
| Camshaft Material | Cast Iron |
| Engine Family | Chrysler 383-440 c.i. 8 Cylinder (1959-1980) |
| Cam and Lifter Kit Upgrade | CL21-243-4 |
| Lifter Type | Hydraulic Flat Tappet |
| Cam Type | Hydraulic Flat Tappet |
| K-Kit Upgrade | K21-243-4 |
| Lifters Included | No |
| SK-Kit Upgrade | SK21-243-4 |
| Valve Springs Required | Yes |
| Assembly Lubricant Included | Yes |
⚠️ 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
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Shipping: Free to the USA.
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