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COMP Cams 11-456-8 Xtreme Marine Hydraulic Roller Camshaft Big Block Chevy - 396-454

(Chevrolet Camaro 1967-72, Corvette 1967-74, Impala 1967-76, Malibu 1967, 1973-75, C1500 1990-93, Chevelle 1967-73, Blazer 1973-74 + 104 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

11-456-8
11 reviews
Sale Price

$577.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The COMP Cams Xtreme Marine camshaft is specifically engineered for high-performance marine applications in Chevrolet Big Block 396-454 engines. This hydraulic roller cam delivers aggressive performance with a 242/248 duration split designed to maximize power output while maintaining reliability in demanding marine environments.

Key Features:

  • Hydraulic roller design reduces friction and wear for extended service life
  • 242/248 degree advertised duration provides strong mid-range to top-end power
  • Marine-specific grind optimized for boat applications and operating conditions
  • Compatible with Chevrolet Big Block 396, 402, 427, and 454 cubic inch engines
  • Requires matching hydraulic roller lifters and compatible valve springs (sold separately)
  • Precision ground from premium core material for consistent lobe profiles

This camshaft is ideal for marine performance builds seeking improved throttle response and power delivery across the RPM range. The hydraulic roller design offers quieter operation and lower maintenance compared to solid roller alternatives while still providing excellent performance characteristics for recreational and performance boating applications.

Products specifications

Fits

Chevrolet Camaro 1967-72, Corvette 1967-74, Impala 1967-76, Malibu 1967, 1973-75, C1500 1990-93, Chevelle 1967-73, Blazer 1973-74, C10 Pickup 1968-74, Caprice 1967-76, C10 1975-80, El Camino 1967-75, Monte Carlo 1970-75 + 99 more models

Basic Operating RPM Range

2,800-6,200

Exhaust Valve Lift

0.566

Intake Valve Lift

0.566

Camshaft Material

Austempered Ductile Iron

Cam and Lifter Kit Upgrade

CL11-456-8

K-Kit Upgrade

K11-456-8

SK-Kit Upgrade

SK11-456-8

Grind Number

XM296HR

Camshaft Series

Xtreme Marine

Assembly Lubricant Included

No

Lifters Included

No

LOBE SEPARATION

112

Valve Springs Required

Yes

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for On-Road Vehicles?

No

C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?

Yes, but must be a race/competition only vehicle.

C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

Camshaft Gear Attachment

3-Bolt

Lifter Type

Hydraulic Roller

Exhaust Duration at .050 inch Lift

248

Intake Duration at .050 Inch Lift

242

Cam Type

Hydraulic Roller

Usage

Marine

Advertised Exhaust Duration

302

Advertised Intake Duration

296

Engine Family

Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)

AMAZON ASIN

B000P5B5K4

love the price wow!!!! thank you guys for being around I just saved over 50 bucks!)

GOT THE RIGHT PART, FASTER THEN EXPECTED.

Super fast shipping

Great service

Shopping experience was great. They had the parts that I needed at a great price. I would highly recommend shopping with Autoplicity.com.

quick delivery

Very satisfied! My intake shipped on Friday and I received it on Tuesday. Not only super fast shipping, but a great deal to boot!

Easy. Fast. Excellent Pricing.

Quick and easy. Hope they have shoes in stock.

I ordered a hitch off of this site for Christmas, I have never heard of it nor did I know how they were, but they are great! Got my package in I'd say 4 days, very fast and it was exactly what I wanted! Only down fall was they charged me 3 times and I was short 150$ for a few days. I got my money back and I would definitely order again.

Very good customer service asked about a lot of different springs and parts for my Mazdaspeed 3.

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