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COMP Cams SK12-677-4 Xtreme Energy 236/242 Solid Flat Tappet Cam Kit for Chevy Small Block

(GMC G2500 1979-94, Yukon 1992-94, K1500 1979-86, 1988-94, C1500 1979-86, 1988-94, K2500 1979-86, 1988-94, Jimmy 1970-91 + 218 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

SK12-677-4
5 reviews
Sale Price

$516.95

Estimated ship date Tuesday, November 24

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Product Details

The COMP Cams SK12-677-4 Xtreme Energy camshaft kit delivers aggressive performance for small block Chevrolet engines. This complete SK-Kit (Small Kit) features a solid flat tappet camshaft with 236°/242° advertised duration, designed to provide excellent mid-range to high-RPM power with a strong performance idle sound.

Complete Kit Includes:

  • Xtreme Energy solid flat tappet camshaft with aggressive lobe profiles
  • High-quality solid lifters engineered for durability and precision valve control
  • Timing chain set for proper cam timing and synchronization
  • Assembly lube to ensure proper break-in and component protection
  • COMP Cams decals and detailed installation instructions

Key Specifications:

  • Advertised Duration: 236° Intake / 242° Exhaust
  • Camshaft Type: Solid flat tappet
  • Application: Chevrolet Small Block V8 engines
  • Series: Xtreme Energy

The Xtreme Energy series is ideal for street/strip applications and performance street machines where throttle response and strong mid-range torque are priorities. This solid flat tappet design provides excellent durability and valve control at higher RPM ranges compared to hydraulic alternatives. The kit includes everything needed for a professional camshaft installation except pushrods and valve springs, which should be selected based on your specific engine build.

Performance Characteristics:

  • RPM Range: 1,500-6,000 RPM (optimal power band)
  • Rough idle with aggressive cam sound
  • Requires aftermarket valve springs and pushrods (not included)
  • Best suited for manual transmission or high-stall converter automatic
  • May require aftermarket headers and intake manifold for optimal performance

This camshaft kit is designed for enthusiasts building high-performance small block Chevy engines for muscle cars, hot rods, and street machines. Professional installation recommended due to solid lifter setup requiring periodic valve lash adjustment.

Products specifications

Fits

GMC G2500 1979-94, Yukon 1992-94, K1500 1979-86, 1988-94, C1500 1979-86, 1988-94, K2500 1979-86, 1988-94, Jimmy 1970-91, C3500 1979-86, 1988-94, K2500 Suburban 1979-86, 1992-94, K3500 1979-86, 1988-94 + 215 more models

Advertised Exhaust Duration

280

Lifter Type

Solid Flat Tappet

Exhaust Valve Lift

0.51

Kit Type

SK-Kit - Small Kit

Intake Valve Lift

0.501

Camshaft Material

Cast Iron

Cam Type

Solid Flat Tappet

AMAZON ASIN

B001R9DUG4

Usage

Street/Performance

Assembly Lubricant Included

Yes

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.

Gaskets Included

No

Advertised Intake Duration

274

Basic Operating RPM Range

2,000-6,400

Camshaft Gear Attachment

3-Bolt

Locks Included

No

Exhaust Duration at .050 inch Lift

242

Intake Duration at .050 Inch Lift

236

Lifters Included

Yes

Retainers Included

No

Timing Chain and Gears Included

Yes

Engine Family

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

Valve Stem Seals Included

No

Pushrods Included

No

Camshaft Series

Xtreme Energy

Great seller fast shipping!!!

Very satisfied! My intake shipped on Friday and I received it on Tuesday. Not only super fast shipping, but a great deal to boot!

Great pricing,fast shipping!

I ordered a hitch off of this site for Christmas, I have never heard of it nor did I know how they were, but they are great! Got my package in I'd say 4 days, very fast and it was exactly what I wanted! Only down fall was they charged me 3 times and I was short 150$ for a few days. I got my money back and I would definitely order again.

Very good customer service asked about a lot of different springs and parts for my Mazdaspeed 3.

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