My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

COMP Cams 11-240-4 Xtreme Marine Hydraulic Flat Camshaft Chevy Big Block - 234/244 396-454

(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

11-240-4
17 reviews
Sale Price

$309.95

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The COMP Cams Xtreme Marine camshaft is specifically engineered for marine applications in Chevrolet Big Block engines displacing 396-454 cubic inches. This hydraulic flat tappet camshaft delivers a performance-oriented profile with 234 degrees of intake duration and 244 degrees of exhaust duration, designed to provide strong mid-range torque and reliable power delivery for marine environments.

Key Features:

  • Hydraulic flat tappet design for reduced maintenance and quiet operation
  • 234° intake / 244° exhaust duration for optimal marine performance
  • Marine-specific grind optimized for propeller loads and sustained RPM
  • Compatible with Chevrolet Big Block 396, 402, 427, and 454 engines
  • Delivers strong torque curve ideal for marine applications
  • Requires marine-rated valve springs and components (sold separately)

The Xtreme Marine series is designed to withstand the demanding conditions of marine use, including sustained high-load operation and the unique requirements of powering watercraft. This camshaft provides an excellent balance of power and reliability for boat owners seeking improved performance without sacrificing durability.

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

292

Basic Operating RPM Range

2,000-6,200

Grind Number

XM278H

Cam Type

Hydraulic Flat Tappet

Intake Valve Lift

0.564

Exhaust Valve Lift

0.566

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL11-240-4

K-Kit Upgrade

K11-240-4

SK-Kit Upgrade

SK11-240-4

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.

Camshaft Gear Attachment

3-Bolt

Exhaust Duration at .050 inch Lift

237

Intake Duration at .050 Inch Lift

234

Usage

Marine

AMAZON ASIN

B002DFQ4DM

Advertised Intake Duration

278

Engine Family

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

Easy to use her fast

Order filled promptly and accurately. Would not hesitate to place future orders

Easy web sight to follow. Things I wanted easy to find and order.

Easy checkout

Great site with awesome pricing.

Was an awesome deal & the shipping was surprisingly fast! Thank you!

The part got here a day after I ordered it. It came in great condition & was pretty easy to install. Would 100% shop from autoplicity again!

easy and quick

It was quick and easy! Perfect fit!

First of all, I can not believe how fast I recieved my order, 2 DAYS! Best of all, the instructions made it easy for a non mechanic like me to install.

Best price I could find on the web even after paying for shipping! Shipped in a couple of days and great service!

Best price for the item I needed. Very fast shipping and there consumer service was great on the phone.

Great easy to use website.

Ordered a CAI kit and Autoplicity had the lowest price. They're website didn't correctly match my vehicle to the product and it took a few days to ship. They're support was friendly and quick when I emailed them about the delay.

Great customer service, item shipped quickly. Very satisfied.

Great site. Provided needed technical specs. Shipped promptly. Although I had to ask for the tacking number, it was not emailed, one was provided promptly upon request.

This is the easiest purchase I ever made. The visor is great and installation was a breeze. The service by Autoplicity was A-1. Shipping was better than standard. Will buy from them again.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy