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COMP Cams 11-236-4 Xtreme Marine Hydraulic Flat Camshaft Chevrolet Big Block - 226/236

(Chevrolet Camaro 1967-72, 2014-15, 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

11-236-4
4 reviews
Sale Price

$309.95

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 marine applications using Chevrolet Big Block engines (396-454 cubic inches). This hydraulic flat tappet camshaft delivers a balanced combination of low-end torque and mid-range power, making it ideal for inboard and sterndrive marine engines that demand reliable performance under sustained loads.

Camshaft Specifications:

  • Advertised Duration: 268°/278° intake/exhaust
  • Duration @ .050": 226°/236° intake/exhaust
  • Valve Lift: .454"/.480" intake/exhaust (with 1.7:1 rocker ratio)
  • Lobe Separation Angle: 110°
  • Hydraulic flat tappet design for quiet, reliable operation
  • Marine-specific grind optimized for propeller loads and continuous duty cycles

Key Features:

  • Designed specifically for marine engine operating conditions and duty cycles
  • Smooth idle quality suitable for family boating applications
  • Excellent torque curve for pulling skiers and towing
  • Compatible with factory hydraulic lifters and valve train components
  • Proper break-in procedure required with ZDDP additive for flat tappet camshafts

This camshaft is designed for use with stock or mildly modified Big Block Chevrolet marine engines. Works best with stock compression ratios (9.0:1-10.0:1) and operates efficiently on premium pump gasoline. Requires hydraulic flat tappet lifters, performance valve springs, and pushrods (sold separately).

Products specifications

Fits

Chevrolet Camaro 1967-72, 2014-15, 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

1,600-5,800

Grind Number

XM270H

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.547

Intake Valve Lift

0.544

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL11-236-4

K-Kit Upgrade

K11-236-4

SK-Kit Upgrade

SK11-236-4

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.

Advertised Intake Duration

270

Camshaft Gear Attachment

3-Bolt

Exhaust Duration at .050 inch Lift

236

Usage

Marine

Advertised Exhaust Duration

286

Intake Duration at .050 Inch Lift

226

Engine Family

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

AMAZON ASIN

B000CIS5YI

Great Price on products and Shipping

Fast shipping, Good communication, Highly recommended.!!!

Awesome company to deal with! Had the best price I could find on the internet and then they even gave me 25% off my shipping cost. Ordering was easy and received delivery information with tracking quickly. I will for sure use them again!!<br><br>

quick delivery of the parts I need to fix my jeep

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