What kind of idle sound can I expect with this camshaft?

This COMP Cams Thumpr camshaft is specifically designed to produce a choppy, thumping idle sound. It's a signature characteristic of the Thumpr series, giving your engine a more aggressive and noticeable presence.

What torque converter and gear ratio is recommended for this camshaft?

While this camshaft can work with a stock torque converter, it performs best with a 2000+ RPM stall converter. Pairing it with appropriate rear-end gears will also help maximize its performance potential on the street.

Is this camshaft legal for use in California?

No, this camshaft is not CARB approved and cannot be legally shipped to California due to emissions regulations.

COMP Cams Hydraulic Roller Camshaft Kit GK11-600-8

Name: COMP Cams Camshaft Kit CB 283T HR-107 T
Brand: COMP Cams
Price: 1650.01 USD
Availability: InStock

COMP Cams Camshaft Kit CB 283T HR-107 T

$1650.01

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams Thumpr camshaft kit GK11-600-8 for Chevrolet Big Block 396-454 engines. Choppy idle, high performance street.

Key Features

Fits a wide range of Chevrolet vehicles from 1967-1986.
COMP Cams GK11-600-8 Thumpr camshaft kit.
Hydraulic roller camshaft design for improved durability and performance.
Intake duration: 227 degrees at .050 inch lift.
Exhaust duration: 241 degrees at .050 inch lift.
107-degree lobe separation angle.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

This COMP Cams Thumpr camshaft kit includes the GK11-600-8 hydraulic roller camshaft, designed for Chevrolet Big Block 396-454 engines. It's built for high-performance street applications and is known for its distinctive choppy, thumping idle sound. While it can work with a stock torque converter, you'll see improved results with a 2000+ RPM stall converter and appropriate gearing.

The camshaft features a 227-degree intake duration and 241-degree exhaust duration at .050 inch lift, with a 107-degree lobe separation angle. This combination is engineered to provide a noticeable performance increase for street use, offering a more aggressive feel and sound compared to stock. The hydraulic roller design means less friction and wear compared to flat tappet cams, contributing to better reliability and longevity.

This kit is a solid option for enthusiasts looking to give their classic Chevrolet a more aggressive personality and improved performance. It fits a wide range of Chevrolet vehicles from the late 1960s through the mid-1980s, including popular models like the Chevrolet C10 Pickup, Chevrolet Impala, and Chevrolet Camaro. Remember that this camshaft is not CARB approved and cannot be shipped to California.