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COMP Cams 12-866-9 Drag Race 276/284 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)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-866-9
8 reviews
Sale Price

$433.43

Estimated ship date Friday, November 27

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Product Details

The COMP Cams 12-866-9 is a high-performance solid roller camshaft designed specifically for drag racing applications in Chevrolet small block engines. This aggressive camshaft delivers maximum power at high RPM ranges, making it ideal for dedicated race engines where idle quality and street manners are secondary to outright performance.

Key Specifications:

  • Advertised Duration: 276° intake / 284° exhaust
  • Solid roller design for maximum valve control and high RPM stability
  • Optimized lobe profiles for drag racing power curves
  • Requires aftermarket valve springs, retainers, and pushrods
  • Designed for competition engines with modified valve trains
  • Best suited for engines with 9.5:1 or higher compression ratio

Performance Characteristics:

  • Aggressive lift and duration for maximum horsepower and torque at high RPM
  • Rough idle with significant lope - not intended for street use
  • Requires high-stall torque converter (3,500+ RPM) and rear gearing
  • Power range typically 3,000-7,500 RPM depending on engine build

This camshaft is intended for race-only applications and requires professional installation and proper valve train setup. Must be used with compatible solid roller lifters, upgraded valve springs, and precision engine assembly. Not legal for street use in emissions-controlled vehicles.

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

305

Basic Operating RPM Range

5,000-8,000

Usage

Strip

Exhaust Valve Lift

0.66

Intake Valve Lift

0.819

Intake Duration at .050 Inch Lift

276

Exhaust Duration at .050 inch Lift

284

Grind Number

305HXLR-6

Camshaft Series

Drag Race

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

Camshaft Material

Billet Steel

LOBE SEPARATION

106

Advertised Exhaust Duration

313

AMAZON ASIN

B005H89X3A

Engine Family

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

Lifter Type

Solid Roller

Fast shipping times! Great prices!

I was looking for a part for my Mallory distributor at a fair price. I called around to my local speed shops and they all had to order the part, so I went on line. With a little research for the best price here, at Autoplicity. I ordered the part last night and it has shipped 24 hours later. I like that. I have bookmarked Autoplicity so I can use the again. Thanks guys.<br><br>Jim

Have not recieved order yet, but price was good. Will see how long it takes and if I get the right product. Writing this review before arrivial.

Had problems using the search tool so I called direct. They helped locate Air Lift shocks I needed and told me that I.E. browser is sometimes a problem. They were helpful and my items got shipped the next business day.

I would love more pictures of actual product and on viechle

Had the best pricing for the item I wanted and customer service was excellent. Called about shipping and were responsive and quick to get me the details. Will buy from them again.

Definitely the lowest price! Quick shipping, and great communication and follow-through.

Excellent and very quick service. I could not find this product in stock from any other supplier so I kept hunting. I found Autoplicity and from now on they are the first company I will try. Thank you.

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