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Comp Cams Part Number 11-451-8 is an Xtreme Marine 230/236 hydraulic roller camshaft designed for Chevrolet 396–454 big block marine engines (1967–1996). Engineered specifically for marine use, this cam works exceptionally well in jet boat applications utilizing an impeller, providing strong midrange torque and reliable performance for both recreational and high-output setups.
Marine-approved Xtreme Marine hydraulic roller camshaft
Ideal for jet boats with impeller-driven propulsion
Excellent power and reliability for pleasure or performance use
Strong midrange torque and throttle response
2,200–5,800 RPM operating range
3-bolt camshaft gear attachment
| Specification | Value |
|---|---|
| Camshaft Type | Hydraulic Roller |
| Series | Xtreme Marine |
| Marine Approved | Yes |
| Engine Family | Chevrolet 396–454 (1967–1996) |
| RPM Range | 2,200–5,800 |
| Advertised Duration (Int/Exh) | 284 / 290 |
| Duration @ .050" (Int/Exh) | 230 / 236 |
| Valve Lift (Int/Exh) | 0.547 / 0.547 |
| Lobe Separation Angle | 112° |
| Intake Open (BTDC) | 32° |
| Intake Close (ABDC) | 72° |
| Exhaust Open (BBDC) | 79° |
| Exhaust Close (ATDC) | 31° |
| Valve Timing @ .006" | Not specified |
| Cam Gear Attachment | 3-Bolt |
| Usage | Marine |
| Lifter Type | Hydraulic Roller |
| Warranty | 12 Months |
| UPC | 036584038535 |
| Emissions Code | Not specified |
| Make | Chevrolet |
| California Proposition 65 | Cancer & Reproductive Harm (P65Warnings.ca.gov) |
Make: Chevrolet
Engine Family: 396 / 402 / 427 / 454 big block marine engines
Model Years: 1967–1996
Application Notes:
Ideal for jet boats
Designed for marine operating environments
