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 11-678-5 Xtreme Energy Hydraulic Flat Tappet Camshaft - BBC 396-454

(Chevrolet Camaro 1967-72, Corvette 1966-74, Impala 1965-76, Malibu 1966-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74 + 107 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

11-678-5
14 reviews
Sale Price

$325.95

4 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 Xtreme Energy 11-678-5 camshaft is designed to deliver aggressive performance for big block Chevrolet engines from 396 to 454 cubic inches. This solid flat tappet camshaft features a 244/252 duration split, providing strong mid-range to top-end power for street/strip applications.

Camshaft Specifications:

  • Advertised Duration: 244° intake / 252° exhaust
  • Duration @ .050": 224° intake / 232° exhaust
  • Valve Lift: .454" intake / .480" exhaust (with 1.7 rocker ratio)
  • Lobe Separation Angle: 110°
  • Recommended RPM Range: 1,500-6,000 RPM
  • Recommended Valve Spring: COMP Cams #981-16 or equivalent

Key Features:

  • Xtreme Energy lobe profiles for improved throttle response and power
  • Solid flat tappet design for maximum durability and performance
  • Ideal for street machines, muscle cars, and weekend strip racing
  • Works well with stock or mildly modified cylinder heads
  • Requires aftermarket valve springs and proper break-in procedure

This camshaft is engineered for enthusiasts seeking noticeable performance gains with a lopey idle and strong acceleration. Compatible with manual or automatic transmissions with a minimum 2,400-2,800 RPM stall converter recommended for automatic applications.

Products specifications

Fits

Chevrolet Camaro 1967-72, Corvette 1966-74, Impala 1965-76, Malibu 1966-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74, C10 Pickup 1968-80, Caprice 1966-76, C10 1975-81, El Camino 1966-75, Monte Carlo 1970-75 + 102 more models

Advertised Intake Duration

282

Basic Operating RPM Range

2,400-6,800

Grind Number

XS282S

Lifter Type

Solid Flat Tappet

Intake Duration at .050 Inch Lift

244

Exhaust Duration at .050 inch Lift

252

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL11-678-5

K-Kit Upgrade

K11-678-5

SK-Kit Upgrade

SK11-678-5

Cam Type

Solid Flat Tappet

Usage

Street/Performance

Assembly Lubricant Included

Yes

Lifters Included

No

LOBE SEPARATION

110

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

Advertised Exhaust Duration

290

Intake Valve Lift

0.59

Exhaust Valve Lift

0.598

Engine Family

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

AMAZON ASIN

B000P592YA

Camshaft Series

Xtreme Energy

great prices and a good selection of parts. one of my favorite parts pages.

Nice stuff worth the money

I have used autoplicity a few times in the past. Prices are always very good and delivery was fast.

Its great

Great Products!!!! Too Bad no free shipping!

Love the product and it arrived quickly. Everything was great except the shipping - which I know you can't help. The box was badly damaged when it arrived and I was nervous that I would have to return it. Thankfully the product was undamaged. The instructions and keys were halfway hanging outside of the shipping box and could have very easily been lost. Not sure how to remedy reckless delivery personnel.

Great price and fast delivery. Website was easy to use unlike many I have searched for parts with . Happy customer here and will recommend and likely shop here again. Thanks

this is my new home... very cool site, beat summit and jegs by $20 to $30

Great customer service. Fast order processing. Hassle free transaction.

Very fast shipping, received it Monday when I ordered it on Thursday. Thanks!

Great price and fast shipping! If your looking for quality brands at the best price available!!<br>

Autoplicity is awsome!! lowest prices.. fast shipping great customer service.. this is hard to find in todays world!!

Great service and communication. Once it was shipped, I was able to track my item. Best price I could find on the internet!! Would definitely do business with anytime.

with there free shipping they distroyed summit and jegs. Autopilcity just got a new customer and I buy a lot of parts.

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