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COMP Cams 12-422-8 Xtreme Energy Hydraulic Roller Camshaft SBC - 218/224

(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 + 240 more models)

Part of: COMP Cams Xtreme Energy Hydraulic Roller Camshaft GM

Other options in this family: COMP Cams 08-500-8 COMP Cams 20-811-9 COMP Cams 20-810-9 COMP Cams 07-503-8 COMP Cams 12-408-8

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-422-8
6 reviews
Sale Price

$577.95

2 left at this price

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Usually delivered within 2 days

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Product Details

The COMP Cams Xtreme Energy hydraulic roller camshaft is engineered for small block Chevrolet engines seeking aggressive street performance with excellent idle quality. This cam delivers a duration of 218 degrees intake and 224 degrees exhaust at 0.050" lift, providing a noticeable performance gain over stock while maintaining streetability.

Key Specifications:

  • Duration at 0.050": 218° intake / 224° exhaust
  • Advertised duration: 274° intake / 280° exhaust
  • Valve lift (with 1.5 ratio rockers): 0.454" intake / 0.474" exhaust
  • Lobe separation angle: 112°
  • Hydraulic roller design for reduced friction and improved durability

Performance Features:

  • Ideal RPM range: 1,500-5,500 RPM
  • Excellent choice for street/strip applications and towing
  • Works well with stock or aftermarket cylinder heads
  • Produces a moderate lope at idle with strong mid-range torque
  • Recommended for engines with 9.0:1 to 10.0:1 compression ratio

This camshaft requires hydraulic roller lifters, compatible valve springs, and pushrods (sold separately). The Xtreme Energy profile is designed to maximize torque and horsepower while maintaining vacuum for power brakes and automatic transmissions. Perfect for daily drivers looking for that classic performance cam sound and improved throttle response.

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 + 236 more models

Advertised Exhaust Duration

276

Basic Operating RPM Range

1,600-5,400

Grind Number

XR270HR

Exhaust Valve Lift

0.502

Camshaft Material

Austempered Ductile Iron

Cam and Lifter Kit Upgrade

CL12-422-8

K-Kit Upgrade

K12-422-8

SK-Kit Upgrade

SK12-422-8

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.

Advertised Intake Duration

270

Camshaft Gear Attachment

3-Bolt

Lifter Type

Hydraulic Roller

Cam Type

Hydraulic Roller

Intake Valve Lift

0.495

Exhaust Duration at .050 inch Lift

224

Intake Duration at .050 Inch Lift

218

Engine Family

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

AMAZON ASIN

B000CESFKQ

Camshaft Series

Xtreme Energy

Easier than expected, 917-612 w/gear to fit the AX4S should go on your drawing board... Please

I Received the jack with a bent frame and unusable. The right side side plate at the rear caster was bent such that I can't pump the jack. The box packaging looked ok until I took the jack out of the box and tried to operate the jack. I called Brunnhoelzl Racing and spoke with Mr. Brunnhoelzl and he told me to return the jack due to freight damage. I called this morning to your Customer service department and spoke with Elzert who told me to take some pictures and email them to [email protected] as I have. The jack cost me $914.17 and I can't it. Bill Pagnano 707 544-3020

Web site need more parts details

Great price, exactly what I needed. I will definitely return to Autoplicity for future autoparts orders! Thanks!

Great prices

Very quick service and lowest price.

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