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COMP Cams K12-678-4 Xtreme Energy Solid Flat Tappet Camshaft K-Kit for Chevy Small Block - 244/252

(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 + 242 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

K12-678-4
6 reviews
Sale Price

$796.95

Estimated ship date Wednesday, November 25

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Live-in-stock inventory

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Fitment guaranteed

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Product Details

The COMP Cams K12-678-4 Xtreme Energy K-Kit is a complete camshaft installation package designed for Chevrolet small block engines seeking increased performance across the RPM range. This solid flat tappet cam features aggressive 244/252 duration specs that deliver excellent mid-range to top-end power, making it ideal for street/strip applications, muscle cars, and performance builds that prioritize throttle response and horsepower gains.

Complete K-Kit Includes Everything You Need:

  • Xtreme Energy 244/252 solid flat tappet camshaft
  • Solid flat tappet lifters engineered to match cam profile
  • High-performance valve springs with increased seat and open pressures
  • Precision valve spring retainers
  • Valve locks (keepers) for secure retention
  • Valve stem seals for proper oil control
  • Timing chain set for accurate valve timing
  • Assembly lube to ensure proper break-in
  • Installation instructions and decals

The Xtreme Energy cam line from COMP Cams utilizes advanced lobe profiles that maximize area under the lift curve for improved cylinder filling and power production. This solid flat tappet design requires periodic valve lash adjustment but offers superior performance potential and durability in demanding applications. The included high-performance valve springs are matched to the camshaft's lift and duration characteristics to prevent valve float at high RPM while maintaining proper spring control throughout the valve train.

This K-Kit eliminates the guesswork of component selection by providing all the essential parts needed for a complete camshaft upgrade in one package. Perfect for engine rebuilds, performance upgrades, or racing applications where reliable power gains are critical.

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 + 239 more models

Advertised Intake Duration

282

Basic Operating RPM Range

2,400-6,800

Lifter Type

Solid Flat Tappet

Intake Valve Lift

0.52

Intake Duration at .050 Inch Lift

244

Exhaust Duration at .050 inch Lift

252

Camshaft Material

Cast Iron

Kit Type

K-Kit - Complete Kit

Cam Type

Solid Flat Tappet

AMAZON ASIN

B001R98I84

Usage

Street/Performance

Assembly Lubricant Included

Yes

LOBE SEPARATION

110

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.

Gaskets Included

No

Camshaft Gear Attachment

3-Bolt

Exhaust Valve Lift

0.54

Lifters Included

Yes

Advertised Exhaust Duration

290

Valve Springs Included

Yes

Engine Family

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

Camshaft Series

Xtreme Energy

seems to be just a few glitches with the check out, but seemed to be ok in the end

I'm new buyer, the price are right so, this what I'm looking. Thank you, I'll be in contact with you. Ivan Jozic

This website is very reasonable for me to purchase the items I need.

great experience, good price, item arrived within 4 days of purchase, would do business with again in future !

Thanks my complete order is for a 2000 ford ranger 2.5 thanks

Easy order placement, fast shipment

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