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COMP Cams 11-456-8 Xtreme Marine 242/248 Hydraulic Roller Cam for Chevrolet Big Block 396-454
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.
Good for jet boat with A or B impeller in bracket racing or performance use.
BBC - 1965-66 396 c.i.d. models have an oiling groove in the rear journal. The listed part numbered cams will not fit these models, so if you require a Camshaft with the oiling groove, please call us at 1-800-999-0853 or contact us, and we will assist you with placing an order. WARNING: Camshaft Optimized for use with a Melanized or Nitrided distributor Gear. Not compatible with cast or Steel Gears without similar surface treatments. Failure to utilize the proper distributor Gear will void all warranties and/or return policies.
Specifications
| Camshaft Series | Xtreme Marine |
| Usage | Marine |
| Exhaust Valve Lift | 0.566 IN |
| Camshaft Gear Attachment | 3-Bolt |
| Advertised Exhaust Duration | 302 deg |
| Camshaft Material | Austempered Ductile Iron |
| Engine Family | Chevrolet 396-454 c.i. 8 Cylinder (1967-1996) |
| Cam and Lifter Kit Upgrade | CL11-456-8 |
| Lifter Type | Hydraulic Roller |
| Intake Valve Lift | 0.566 IN |
| Lobe Separation | 112 deg |
| Basic Operating RPM Range | 2,800-6,200 RPM |
| Intake Duration at .050 Inch Lift | 242 deg |
| Exhaust Duration at .050 inch Lift | 248 deg |
| Advertised Intake Duration | 296 deg |
| Camshaft Gear Attachment | 3 |
| Cam Type | Hydraulic Roller |
| Grind Number | XM296HR |
| Valve Springs Required | Yes |
| K-Kit Upgrade | K11-456-8 |
| Assembly Lubricant Included | No |
| Lifters Included | No |
| SK-Kit Upgrade | SK11-456-8 |
⚠️ 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.
Shipping Information
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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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