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COMP Cams 12-870-11 Drag Race Hydraulic Roller Camshaft Chevrolet Small Block - 248/256

(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)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-870-11
12 reviews
Sale Price

$612.95

1 left at this price

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Usually delivered within 2 days

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Product Details

The COMP Cams 12-870-11 is a high-performance hydraulic roller camshaft engineered specifically for drag racing applications in Chevrolet small block engines. This camshaft delivers aggressive power characteristics with a 248/256 duration split, optimized for maximum acceleration and top-end performance on the strip.

Key Specifications:

  • Advertised Duration: 248° intake / 256° exhaust
  • Hydraulic roller design for reduced friction and maintenance-free operation
  • Engineered for Chevrolet small block V8 engines (262-400 cubic inches)
  • Drag race grind optimized for high RPM power and quick acceleration
  • Requires aftermarket valve springs and matching hydraulic roller lifters

Performance Characteristics:

  • Ideal powerband for bracket racing and street/strip applications
  • Aggressive lobe profiles deliver strong mid-range to top-end power
  • Hydraulic roller technology provides durability with performance cam timing
  • Compatible with stock or aftermarket cylinder heads

This camshaft requires proper valve train components including compatible hydraulic roller lifters, pushrods, valve springs, and retainers. Professional installation and proper break-in procedures are recommended to ensure optimal performance and longevity.

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

Advertised Exhaust Duration

311

Advertised Intake Duration

301

Basic Operating RPM Range

3,500-6,500

Usage

Strip

Exhaust Valve Lift

0.582

Intake Valve Lift

0.597

Intake Duration at .050 Inch Lift

248

Grind Number

301QNHR-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

Lifter Type

Hydraulic Roller

Cam Type

Hydraulic Roller

Camshaft Material

Billet Steel

LOBE SEPARATION

106

Engine Family

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

Exhaust Duration at .050 inch Lift

256

easy to find, nice site; shipping options should be listed before we get to the cart, however.

Easy transaction

Need more through descriptions on products

Very good. Easily found what i wanted

Fast and convenient!

Quick shipping, low price, easy website. Thanks guys!

cheapest price on the web thanks for the great value, shipping was <br>a little slow but it was free and came with a tracking number<br><br>Thanks<br>

The ordering was easy and recieved the product the next day.Excellent company.

Great product and was the cheapest I could find. Easy to order and shipping information e-mailed to me the next day.

Filter was as described, quick ship, great price, thanks!

Great price, fast shipping and the items was correct. A perfect transaction. Thank you!

The best pricing around and great shipping and communication when I reached out to them. Thank you Autoplicity!

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