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COMP Cams 11-771-8 Xtreme Energy Solid Roller Camshaft Chevrolet Big Block - 242/248

(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

11-771-8
5 reviews
Sale Price

$577.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The COMP Cams Xtreme Energy 11-771-8 is a high-performance solid roller camshaft designed specifically for Chevrolet Big Block engines (396-454 cubic inches). This camshaft delivers aggressive performance characteristics ideal for street/strip applications where maximum power and throttle response are priorities.

Camshaft Specifications:

  • Advertised Duration: 290°/296° intake/exhaust
  • Duration @ .050": 242°/248° intake/exhaust
  • Valve Lift (with 1.7 ratio rockers): .614"/.614" intake/exhaust
  • Lobe Separation Angle: 110°
  • Valve Lash (Hot): .020"/.020" intake/exhaust
  • RPM Range: 2,500-6,800 RPM

Key Features:

  • Solid roller design eliminates lifter pump-up for high RPM stability
  • Aggressive lobe profiles provide exceptional power throughout the RPM range
  • Ideal for engines with aftermarket heads, intake manifolds, and headers
  • Requires solid roller lifters, hardened pushrods, and appropriate valvespring package
  • Compatible with stock or aftermarket ignition systems

This camshaft is engineered for serious performance enthusiasts running modified Big Block Chevrolet engines. Best results are achieved with compression ratios of 10.0:1 or higher, quality cylinder heads with good flow characteristics, and a minimum 3,000+ RPM stall converter for automatic transmissions. Professional installation and proper valvetrain setup are strongly recommended.

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

Basic Operating RPM Range

2,500-6,500

Grind Number

XR280R

Intake Valve Lift

0.646

Exhaust Valve Lift

0.653

Camshaft Material

Austempered Ductile Iron

Cam and Lifter Kit Upgrade

CL11-771-8

K-Kit Upgrade

K11-771-8

SK-Kit Upgrade

SK11-771-8

Usage

Street/Performance

Assembly Lubricant Included

No

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

Exhaust Duration at .050 inch Lift

248

Intake Duration at .050 Inch Lift

242

Cam Type

Solid Roller

Advertised Exhaust Duration

286

AMAZON ASIN

B001O061IU

Advertised Intake Duration

280

Lifter Type

Solid Roller

Engine Family

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

Camshaft Series

Xtreme Energy

Fast shipping on purchased item. Had in stock when other's did not.

Simply put: Best pricing I've found on the net, quick shipping, no hassles. Will be ordering more products from Autoplicity.

Wow, what a deal. Great price on the product and shipping. What else can I order from these guys? They'll be my first stop.

I ordered what i needed at a very affordable price and the shipping was fast... 3 days.. i will be using these guys again..

The order process is simple and efficient. Shipping was quick. Price was excellent.

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