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COMP Cams 12-856-9 Oval Track 253/262 Solid Roller Camshaft for Chevy Small Block

(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 + 238 more models)

Part of: COMP Cams Oval Track Solid Roller Camshaft Chevy Small Block

Other options in this family: COMP Cams 12-857-9 COMP Cams 12-861-9 COMP Cams 12-911-9 COMP Cams 12-940-9 COMP Cams 12-996-9

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-856-9
10 reviews
Sale Price

$558.95

Estimated ship date Tuesday, November 24

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Product Details

The COMP Cams 12-856-9 is a high-performance solid roller camshaft specifically designed for oval track racing applications in Chevrolet small block engines. This camshaft delivers aggressive lift and duration characteristics optimized for competitive circle track racing where maximum RPM performance and reliability are critical.

Camshaft Specifications:

  • Intake Duration: 253 degrees
  • Exhaust Duration: 262 degrees
  • Solid roller lifter design for maximum valve train stability
  • Engineered for oval track racing demands
  • Optimized lobe profiles for high-RPM operation

Key Features:

  • Solid roller design eliminates lifter pump-up at high engine speeds
  • Advanced lobe geometry provides excellent valve control and acceleration
  • Precision-ground on COMP Cams proprietary CNC grinding equipment
  • Ideal for dirt track and asphalt oval racing small block Chevy engines
  • Requires solid roller lifters, hardened pushrods, and dual valve springs (sold separately)

This camshaft is designed for serious racing applications and requires proper valve train components including solid roller lifters, high-pressure valve springs, hardened pushrods, and appropriate break-in procedures. Professional installation and proper engine assembly are strongly recommended to achieve optimal performance and reliability.

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 + 234 more models

Basic Operating RPM Range

3,200-7,400

Usage

Strip

Exhaust Valve Lift

0.63

Intake Valve Lift

0.645

Grind Number

281TKBR-6

Camshaft Series

Oval Track Xtreme TK

Assembly Lubricant Included

No

Lifters Included

No

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

Cam Type

Solid Roller

AMAZON ASIN

B001G7CYFA

Camshaft Material

Billet Steel

LOBE SEPARATION

106

Advertised Exhaust Duration

295

Advertised Intake Duration

281

Engine Family

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

Exhaust Duration at .050 inch Lift

262

Intake Duration at .050 Inch Lift

253

Lifter Type

Solid Roller

Easy to navigate.

Easy so far

Easy to follow, and found what I was looking for at a very reasonable price. I will be back for more. Customer service very very friendly and helpful when i had to return a part. Was completely no hassle and will gladly keep shopping with Autoplicity for

way cheaper than everywhere else. Lets hope the product is good!

great site as long as my part gets to me thank you

Great place.

Quite easy.

Great online experiance

Great price on parts, shipping a tad high but still okay

great prices and customer service was very helpful.

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