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COMP Cams 12-657-20 Oval Track Nitrous 256/262 Solid Flat Tappet 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 + 238 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-657-20
7 reviews
Sale Price

$406.95

1 left at this price

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Product Details

The COMP Cams 12-657-20 is a high-performance solid flat tappet camshaft specifically designed for oval track racing applications with nitrous oxide injection systems. This camshaft is engineered for Chevrolet Small Block engines and delivers an aggressive profile optimized for maximum power under nitrous.

Key Specifications:

  • Advertised Duration: 256° intake / 262° exhaust
  • Solid flat tappet design for racing durability
  • Oval track nitrous-specific grind profile
  • Optimized for Chevrolet Small Block V8 engines (262-400 ci)
  • Requires valve spring upgrade and proper break-in procedure

This camshaft provides strong mid-range to top-end power characteristics ideal for circle track racing with nitrous systems. The solid lifter design eliminates pump-up issues at high RPM and provides consistent valve control under extreme loads. Professional installation and proper setup with matching valve train components is recommended for optimal performance and reliability.

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 Intake Duration

286

Basic Operating RPM Range

3,200-6,900

Usage

Strip

Lifter Type

Solid Flat Tappet

Intake Valve Lift

0.549

Intake Duration at .050 Inch Lift

256

Grind Number

286XO-6

Camshaft Material

Nitrided Cast Iron

Cam Type

Solid Flat Tappet

Camshaft Series

Xtreme Oval

Assembly Lubricant Included

Yes

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

LOBE SEPARATION

106

Advertised Exhaust Duration

296

AMAZON ASIN

B002EDXE2W

Engine Family

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

Exhaust Valve Lift

0.543

Exhaust Duration at .050 inch Lift

262

First time customer of autoplicity. Wasn't able to use my paypal account without using Paypal credit card which I do not have, thus have set up account with autoplictiy. I guess it's a Paypal issue but would have been convenient to have used my Paypal account.

Great prices, easy to navigate site!

Free shipping will be nice for orders over $50.00

Love that you can pay with Amazon

Great sources,very easy ordering,outstanding prices, <br>I will always check their prices first !!

super easy! thanks!

Piece of cake very thorough. Like the Amazon parallel site usage!

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