My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

COMP Cams 12-656-5 Oval Track 252/258 Solid Flat Tappet 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 + 238 more models)

Part of: COMP Cams Oval Track Solid Flat Tappet Camshaft Chevy Small Block

Other options in this family: COMP Cams 12-610-5 COMP Cams 12-652-5 COMP Cams 12-650-5 COMP Cams 12-608-5 COMP Cams 12-645-5

Manufacturer

Picture for manufacturer COMP Cams

Part Number

12-656-5
9 reviews
Sale Price

$325.95

2 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The COMP Cams 12-656-5 is a high-performance solid flat tappet camshaft specifically designed for oval track racing applications in Chevrolet small block engines. This camshaft delivers aggressive valve timing optimized for competitive circle track racing where sustained high-RPM operation and maximum power in the mid-to-upper RPM range are critical.

Camshaft Specifications:

  • Advertised Duration: 252° intake / 258° exhaust
  • Solid flat tappet design for high-RPM stability and durability
  • Engineered specifically for oval track and circle track racing
  • Optimized valve events for sustained high-speed operation
  • Compatible with Chevrolet small block V8 engines (262-400ci)

Performance Characteristics:

  • Aggressive profile delivers strong mid-range to high-RPM power
  • Solid lifter design eliminates lifter pump-up at high RPM
  • Split duration pattern favors exhaust scavenging for improved cylinder filling
  • Designed for race applications with 9.5:1+ compression ratios
  • Requires performance valve springs, solid lifters, and adjustable rocker arms

This camshaft is intended for dedicated race engines and requires professional installation with proper valve train components. Periodic valve lash adjustment is required with solid lifter camshafts. Not recommended for street use or engines with stock compression ratios.

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

292

Advertised Intake Duration

282

Usage

Strip

Lifter Type

Solid Flat Tappet

Intake Valve Lift

0.54

Exhaust Valve Lift

0.537

Intake Duration at .050 Inch Lift

256

Exhaust Duration at .050 inch Lift

258

Grind Number

282XOS-6

Basic Operating RPM Range

3,000-6700

Camshaft Material

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

Engine Family

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

AMAZON ASIN

B000P5D8E0

I ordered a power bleeder from here. I had never heard of this site and decided to give it a go. I'm glad I did! The price was good and they shipped out fast.

cheapest price, multiple payment options, shipped very quickly overall good experience

I searched around and Autoplicity had the best deal. their website was easy to navigate and checkout, and the order shipped quickly. I would definitely buy from them again.

Excellent communication, quick, easy, and lowest price.

My part came very fast, it took only two days to arrive. I feel I got a great deal on the part I bought, and I am very happy with the quality and the service. I will definitely do business again. Thank you.

The price was right and the product was shipped quickly and arrived early. I would recommend them to my friends and family and will order from here again.

I searched and searched and could not find a good price then i found Autoplicity and gave it a try, i couldn't believe i found my headers i wanted at an incredible low price, let alone the shipping was at a fair price even total price was lower than ebay or other places, definitely keeping this site on my sights for new parts and other products im keeping in mind!

This caliper paint green and cool.

They had the best price on the internet! Fast shipping and repsonse.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy