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COMP Cams 12-771-8 Xtreme Energy Solid Roller Camshaft Small Block Chevy - 242/248

(GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-95, C1500 1979-86, 1988-95, K2500 1979-86, 1988-95, Jimmy 1970-91 + 241 more models)

Part of: COMP Cams Xtreme Energy Solid Roller Camshaft Small Block Chevy

Other options in this family: COMP Cams 12-772-8 COMP Cams 12-773-8

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-771-8
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 12-771-8 is a high-performance solid roller camshaft designed specifically for small block Chevrolet engines. This aggressive cam features 242° intake duration and 248° exhaust duration at .050" lift, delivering excellent mid-range to upper RPM power for street/strip applications.

Key Specifications:

  • Intake Duration: 242° @ .050"
  • Exhaust Duration: 248° @ .050"
  • Solid roller design for maximum performance and durability
  • Optimized lobe profiles for Xtreme Energy series performance characteristics
  • Designed for small block Chevrolet V8 engines (262-400 cubic inches)

Performance Features:

  • Aggressive profile delivers strong mid-range to high-RPM power
  • Solid roller construction eliminates flat tappet wear concerns
  • Xtreme Energy lobe design maximizes cylinder pressure and throttle response
  • Ideal for engines with aftermarket cylinder heads, headers, and intake manifolds
  • Recommended for manual transmission or high-stall converter automatic applications

This camshaft requires compatible solid roller lifters, hardened pushrods, appropriate valve springs, and retainers (sold separately). Professional installation and proper break-in procedures are strongly recommended for solid roller camshafts.

Products specifications

Fits

GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-95, C1500 1979-86, 1988-95, K2500 1979-86, 1988-95, Jimmy 1970-91, C3500 1979-86, 1988-95, K2500 Suburban 1979-86, 1992-95, K3500 1979-86, 1988-95, C15/C1500 Pickup 1967-74 + 237 more models

Grind Number

XR280R

Intake Valve Lift

0.57

Exhaust Valve Lift

0.576

Basic Operating RPM Range

500-6,500

Camshaft Material

Austempered Ductile Iron

Cam and Lifter Kit Upgrade

CL12-771-8

K-Kit Upgrade

K12-771-8

SK-Kit Upgrade

SK12-771-8

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

AMAZON ASIN

B000V9ET16

Advertised Exhaust Duration

286

Advertised Intake Duration

280

Engine Family

Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)

Lifter Type

Solid Roller

Camshaft Series

Xtreme Energy

Autoplicity had the item I wanted at a cheaper price than anybody online or in stores. They didn't have the item in stock, but they were very informative as to the status of my item. They have shown unheard of customer service via email since the inception of my order. I will definitely do business with them again.

Quick and easy

cant wait

Ordered a sling to store my roof rack. There was an issue with the supplier which was quickly resolved by the Autoplicity staff. Great customer service -- most responsive I've ever seen.<br><br>Best prices around.

Received the order in 3 business day. Price was the best. Tried the VIAIR 400p that I order and found it to me my expetations.

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