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COMP Cams 12-991-9 Oval Track 256/258 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

12-991-9
10 reviews
Sale Price

$558.95

Estimated ship date Tuesday, November 24

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Product Details

The COMP Cams 12-991-9 is a high-performance solid roller camshaft specifically designed for oval track racing applications in Chevrolet Small Block engines. This camshaft features aggressive duration specs of 256° intake and 258° exhaust, engineered to deliver maximum power in the mid-to-upper RPM range where oval track engines spend most of their time.

Key Features:

  • Solid roller design for maximum valve control and durability under extreme racing conditions
  • 256° intake / 258° exhaV duration optimized for oval track performance
  • Designed specifically for Chevrolet Small Block engines (262-400 cu in)
  • Provides excellent power delivery in the 3,500-7,500 RPM operating range
  • Requires compatible solid roller lifters, pushrods, and valve springs (sold separately)
  • Manufactured from premium materials with precise lobe profiles for consistent performance

This camshaft is ideal for circle track racing applications where sustained high-RPM operation and reliability are critical. Professional installation and proper valve train component selection are essential for optimal performance and engine longevity. Compatible with stock or aftermarket cylinder heads when matched with appropriate valve train components.

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 Intake Duration

292

Basic Operating RPM Range

3,500-6,500

Grind Number

292AR-6

Usage

Strip

Exhaust Valve Lift

0.63

Intake Valve Lift

0.63

Intake Duration at .050 Inch Lift

256

Exhaust Duration at .050 inch Lift

258

Camshaft Series

Oval Track (.900" Base Circle)

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

B000P5G9MS

Camshaft Material

Billet Steel

LOBE SEPARATION

106

Advertised Exhaust Duration

296

Engine Family

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

Lifter Type

Solid Roller

Great price for the item. Both internet and phone conversations were quick and knowledgeable.

the prices were great lowest i found on the net and the shipping is fast

Great price, good e-mail communication and fast shipping. Positive experience with Autoplicity so far.

My experience with autoplicity was great. Great selection and service. Fast shipping. Will definitely use them again.

Cheapest price by far, not the speediest shipment unfortunately.

Found the best price at Autoplicity on my cold air intake. Quick turn-around time and inexpensive shipping. I'll definitely be back.

Thanks for you swift respond for the email and your accurate information and i hope to deal with you again

Great pricing on almost every product! Quick process and fast shipping! Will definitely order from Autoplicity again in the future.

Amazing Prices, saved hundreds over other Performance websites. Fast Shipping to top it off! Even with having to pay for shipping I saved $160 using Autoplicity over another "racing" website. Will absolutely do business with again!

quick and polite service will deal with again

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