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COMP Cams 11-244-20 Xtreme Marine Hydraulic Flat Tappet Camshaft for Chevy Big Block 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

11-244-20
9 reviews
Sale Price

$422.95

Estimated ship date Friday, October 30

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Product Details

The COMP Cams 11-244-20 Xtreme Marine camshaft is specifically engineered for marine applications using Chevrolet Big Block engines in the 396-454 cubic inch range. This hydraulic flat tappet camshaft is designed to deliver reliable performance in the demanding marine environment where sustained RPM operation and durability are critical.

Key Specifications:

  • Advertised Duration: 244?/254? (Intake/Exhaust)
  • Duration @ .050": 224?/234? (Intake/Exhaust)
  • Valve Lift: .462"/.485" (Intake/Exhaust) with 1.7:1 rocker ratio
  • Lobe Separation Angle: 110?
  • Hydraulic flat tappet design for reliable operation
  • Marine-specific grind optimized for sustained mid-range power

Features and Benefits:

  • Nitride heat-treated for enhanced wear resistance and extended service life
  • Designed for marine engines that operate under constant load conditions
  • Produces strong torque in the 1500-5000 RPM range ideal for marine applications
  • Conservative lobe profiles ensure smooth idle and reliable vacuum for power accessories
  • Compatible with stock valve springs and factory fuel systems

This camshaft is ideal for marine engine rebuilds or performance upgrades where reliability and sustained power delivery are more important than peak horsepower. The Xtreme Marine profile delivers excellent throttle response and pulling power throughout the usable RPM range while maintaining the durability needed for marine service.

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

Advertised Exhaust Duration

304

Basic Operating RPM Range

2,500-6,500

Grind Number

XM288H

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.575

Intake Valve Lift

0.57

Intake Duration at .050 Inch Lift

244

Camshaft Material

Nitrided Cast Iron

Camshaft Series

Xtreme Marine

Assembly Lubricant Included

Yes

Lifters Included

No

LOBE SEPARATION

112

Valve Springs Required

Yes

Lifter Type

Hydraulic Flat Tappet

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

Usage

Marine

AMAZON ASIN

B002EDXAQW

Advertised Intake Duration

288

Exhaust Duration at .050 inch Lift

254

Engine Family

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

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