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COMP Cams 12-857-9 Oval Track 255/259 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 + 240 more models)

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

Other options in this family: COMP Cams 12-861-9 COMP Cams 12-911-9 COMP Cams 12-940-9 COMP Cams 12-996-9 COMP Cams 12-864-9

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-857-9
5 reviews
Sale Price

$558.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The COMP Cams 12-857-9 is a high-performance solid roller camshaft specifically designed for oval track racing applications in Chevrolet small block engines. This camshaft delivers aggressive valve timing optimized for the sustained high-RPM demands of circle track competition.

Camshaft Specifications:

  • Advertised Duration: 255° intake / 259° exhaust
  • Lift: Designed for use with 1.5:1 rocker arms
  • Solid roller design for maximum durability and consistent performance
  • Optimized lobe profiles for oval track racing applications
  • Compatible with Chevrolet small block V8 engines (262-400 cubic inches)

Key Features:

  • Solid roller lifter design eliminates valve float at high RPM
  • Aggressive duration specs provide strong mid-range to top-end power
  • Precision-ground lobes ensure consistent valve events
  • Requires solid roller lifters, matching valve springs, and retainers (sold separately)
  • Ideal for dedicated oval track racing engines with supporting modifications

This camshaft requires professional installation and proper valve train components including solid roller lifters, appropriate valve springs, retainers, and pushrods rated for the increased valve lift and duration. A complete valve train upgrade is recommended for optimal performance and reliability in racing conditions.

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

Usage

Strip

Exhaust Valve Lift

0.645

Intake Valve Lift

0.645

Intake Duration at .050 Inch Lift

255

Exhaust Duration at .050 inch Lift

259

Grind Number

283TKR-6

Basic Operating RPM Range

3500-7,500

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

B001G7GVTK

Camshaft Material

Billet Steel

Advertised Exhaust Duration

287

LOBE SEPARATION

106

Advertised Intake Duration

283

Engine Family

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

Lifter Type

Solid Roller

Good fast shipping. Easy ordering.

So far so good

Very smooth purchase

Fantastic ! Ordered a Weather Tech Cargo Liner for my 2012 Ford Explorer. Price was $60 less here than ALL other sites on web. I was skeptical that this was going to be a counterfeit -- as the price was too good to be true. I was extremely happy to receive the genuine product as I expected in less than a week -- and for $60 less than the competitors ! GREAT VALUE and great service ! I will definitely be back !!

Wow Super fast shipping, right product, no hassle no fuss. just how i like it. good job autoplicity keep it up.

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