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COMP Cams K12-600-4 Thumpr Hydraulic Flat Cam K-Kit 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 + 242 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

K12-600-4
14 reviews
Sale Price

$655.95

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The COMP Cams K12-600-4 Thumpr K-Kit delivers aggressive performance and a distinctive lope for Chevrolet Small Block engines. This comprehensive camshaft package features 227/241 duration specs designed to maximize torque and horsepower while producing that classic hot rod sound.

Complete K-Kit Includes Everything You Need:

  • Thumpr hydraulic flat tappet camshaft with 227/241 duration profile
  • Matched hydraulic lifter set engineered for optimal valve train performance
  • High-performance valve springs rated for increased lift and RPM capability
  • Premium retainers and valve locks for secure valve train operation
  • Valve stem seals to prevent oil consumption and maintain proper lubrication
  • Complete timing chain set for precise cam timing and durability
  • Assembly lube specifically formulated for flat tappet cam break-in
  • Installation instructions and COMP Cams decals

The Thumpr series is ideal for street performance applications where aggressive idle characteristics and strong mid-range power are desired. This kit eliminates the guesswork by providing all properly matched valve train components in one package, ensuring compatibility and optimal performance. Perfect for muscle car restorations, street rods, and weekend warriors looking to add serious attitude to their small block Chevy.

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 + 239 more models

Advertised Exhaust Duration

297

Advertised Intake Duration

279

Basic Operating RPM Range

2,000-5,800

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.465

Intake Valve Lift

0.479

Exhaust Duration at .050 inch Lift

241

Camshaft Material

Cast Iron

Kit Type

K-Kit - Complete Kit

AMAZON ASIN

B001S1W03U

Usage

Street/Performance

Assembly Lubricant Included

Yes

Lifter Type

Hydraulic Flat Tappet

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.

Gaskets Included

No

Camshaft Gear Attachment

3-Bolt

Intake Duration at .050 Inch Lift

227

Lifters Included

Yes

LOBE SEPARATION

107

Valve Springs Included

Yes

Engine Family

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

Camshaft Series

Thumpr

Great products & Fast Delivery!

The exact part that I needed and fast shipping.

For what I purchased I am well satisfied. Although I did not receive any e-mails other than the conformation one and now this one. I just did not know when they would arrive. When I called to ask I was told that they have shipped and I would get a e-mail with tracking info, and I did not. But I am satisfied none the less. So thank you.

Prompt shipping

good

Easy to work with order and check out.

So far so good

It's the right one and came as it said it would I will buy again.thank you for your business.

Quick n easy

Best price fast shipping. will deffinitly order again

Excellent business. This is my second purchase and there will be more! I ordered my parts over the holiday weekend and they mailed them the Tuesday after Labor Day. The absolute BEST pricing you will get. You will not find a lower price else ware. The shipping doesn't even take forever like most places you get great pricing. Communication is excellent, the site is very easy to use and navigate. I will be doing business with Autoplicity.com many more times and highly recommend them.

Super Fast! Website was easy to user, multiple different payment options (Amazon, Paypal, Credit Card) Got a notification of shipment within 1 hour!

Website is easy to navigate. Parts are easy to find. Checkout was very simple to use. Good overall service.

Very easy

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