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COMP Cams GK12-600-4 Thumpr Hydraulic Flat Camshaft Kit 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 + 242 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

GK12-600-4
5 reviews
Sale Price

$628.95

Estimated ship date Friday, November 27

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Product Details

The COMP Cams GK12-600-4 Thumpr camshaft kit delivers that aggressive choppy idle and strong performance for Chevrolet small block V8 engines. This complete hydraulic flat tappet cam kit features a 227/241 duration split designed to produce excellent throttle response and a distinctive sound that sets your engine apart.

Key Specifications:

  • Advertised Duration: 279°/293° intake/exhaust
  • Duration at .050": 227°/241° intake/exhaust
  • Valve Lift: .477"/.510" intake/exhaust (with 1.5 rocker ratio)
  • Lobe Separation Angle: 112°
  • Hydraulic flat tappet design
  • RPM Range: 1,600-5,600 RPM

Complete GK-Kit Includes:

  • Camshaft with aggressive Thumpr profile
  • Hydraulic flat tappet lifters
  • Valve springs and retainers
  • Cam break-in lube
  • Installation components

The Thumpr series is engineered for street performance applications where that classic hot rod sound is desired along with improved mid-range power. This cam works exceptionally well in engines with compression ratios of 9.0:1 or higher and requires a 2,200+ RPM stall converter with automatic transmissions. Perfect for muscle car restorations, street rods, and weekend cruisers seeking that unmistakable performance cam sound and feel.

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

Kit Type

GK-Kit - Cam and Gear Kit

K-Kit Upgrade

K12-600-4

AMAZON ASIN

B002EE8YQC

Usage

Street/Performance

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

Locks Included

No

Intake Duration at .050 Inch Lift

227

Lifters Included

Yes

Retainers Included

No

Timing Chain and Gears Included

Yes

Engine Family

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

Valve Stem Seals Included

No

Pushrods Included

No

Camshaft Series

Thumpr

This copany shipped my order promptly. I would do business with them again.

I paid for 2nd day shipping and 5 days later they were shipped out. So, I should receive my rotors in a full week from when I paid for 2 day shipping. I called customer service and they discounted the shipping rate to ground service. At least they were polite and helpful in the phone.

great experience, good price, item arrived within 4 days of purchase, would do business with again in future !

By far the lowest price i've seen on the web for what i have been trying to get, the Injen SRI for my juke. Great price fast shipping! Ill buy all my car stuff here from now on.

Easy order placement, fast shipment

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