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COMP Cams 12-851-9 Oval Track 265/272 Solid Roller Camshaft for Chevrolet 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 12-857-9 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

12-851-9
4 reviews
Sale Price

$558.95

3 left at this price

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Usually delivered within 2 days

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Product Details

The COMP Cams 12-851-9 is a high-performance solid roller camshaft specifically engineered for oval track racing applications in Chevrolet small block engines. This camshaft features aggressive 265/272 duration specifications designed to deliver maximum power in the critical mid-to-upper RPM range where circle track engines spend most of their operating time.

Key Specifications:

  • Advertised Duration: 265° intake / 272° exhaust
  • Lobe separation angle optimized for oval track performance
  • Solid roller design for maximum durability and valve control at high RPM
  • Engineered specifically for Chevrolet small block V8 engines (262-400 cubic inches)
  • Requires solid roller lifters, appropriate valvesprings, and retainers (sold separately)

Performance Characteristics:

  • Powerband optimized for sustained high-RPM operation typical in circle track racing
  • Aggressive profile delivers strong mid-range to top-end power
  • Solid roller construction provides precise valve timing and eliminates lobe wear issues
  • Designed for use with aftermarket cylinder heads and higher compression ratios

This camshaft is intended for dedicated racing applications and requires proper valvetrain components including solid roller lifters, heavy-duty valvesprings, titanium retainers, and appropriate pushrod length. Professional installation and valve lash adjustment are required. Not recommended for street use due to aggressive profile and maintenance requirements.

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

305

Advertised Intake Duration

298

Usage

Strip

Intake Valve Lift

0.648

Exhaust Valve Lift

0.651

Intake Duration at .050 Inch Lift

265

Grind Number

298RX-6

Basic Operating RPM Range

5,600-8,600

Camshaft Series

Oval Track Xtreme RX (50mm Journal)

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

B001G7IZ58

Camshaft Material

Billet Steel

LOBE SEPARATION

106

Engine Family

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

Exhaust Duration at .050 inch Lift

272

Lifter Type

Solid Roller

Quick and easy with great price

Autoplicity has the cheapest prices around and fast shipping. I will do business with them again in the future.

No hassle ordering and fast quality shipping at a reasonable price

Item arrived promptly (4 days after order), price was good and item was as described.

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