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 11-306-5 Marine Hydraulic Flat 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 + 105 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

11-306-5
10 reviews
Sale Price

$325.95

1 left at this price

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 11-306-5 is a marine-specific hydraulic flat tappet camshaft engineered for Chevrolet big block engines ranging from 396 to 454 cubic inches. This camshaft features a 222/226 duration profile designed to deliver reliable performance in marine applications where durability and corrosion resistance are critical.

Key Features:

  • Hydraulic flat tappet design for quiet operation and low maintenance
  • 222° intake / 226° exhaust advertised duration for smooth power delivery
  • Marine-grade materials and coatings for saltwater and freshwater environments
  • Optimized for big block Chevrolet 396, 427, and 454 cubic inch engines
  • Compatible with standard marine valve train components
  • Provides improved throttle response and mid-range torque

This camshaft is specifically designed for marine engines that require dependable performance under demanding boating conditions. The hydraulic flat tappet design eliminates the need for valve lash adjustment while the marine-specific profile ensures proper power characteristics for inboard and sterndrive 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 + 100 more models

Advertised Exhaust Duration

276

Basic Operating RPM Range

1,700-5,700

Grind Number

268AH

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.525

Intake Valve Lift

0.525

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL11-306-5

K-Kit Upgrade

K11-306-5

Camshaft Series

Marine

SK-Kit Upgrade

SK11-306-5

Assembly Lubricant Included

Yes

Lifters Included

No

LOBE SEPARATION

110

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

268

Camshaft Gear Attachment

3-Bolt

Usage

Marine

Exhaust Duration at .050 inch Lift

226

Intake Duration at .050 Inch Lift

222

Engine Family

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

Great prices, fast shipping and kept me informed with several status e-mails. What more could you want.

Thanks...hopefully they are shipped fast

I got the part I ordered and will be having someone install it soon looks just fine and I love the chat feature as well.. thinking about buying brake shoes now.. a lot of savings

Quick and easy

Thanks!

Ordering was quick and easy. We would definitely do business with this outfit again.

Shipping took a little longer than quoted

Service seems acceptable so far

<br>Good prices - seemed to be the best online! Shipping seems normal. / Handling time seemed delayed. If quality is good will order from again.

very easy to find the parts I needed. cant beat the prices either.

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