What supporting modifications are needed for this camshaft kit?

This Big Mutha' Thumpr camshaft kit requires several supporting modifications to function optimally. You'll need an engine with at least 9.5:1 compression, a torque converter rated for 2800+ RPM stall, a performance intake manifold, appropriate rear gearing, and exhaust headers.

What kind of idle can I expect with this camshaft?

This camshaft is designed for aggressive street/strip performance and will produce a very rough idle. This is a normal characteristic for camshafts with these specifications and indicates it's working as intended for high-RPM power.

Is this camshaft kit legal for use in California?

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

COMP Cams Camshaft Kit GK11-602-8 Hydraulic Roller

Name: COMP Cams Camshaft Kit CB 299T HR-107 B
Brand: COMP Cams
Price: 1650.01 USD
Availability: InStock

COMP Cams Camshaft Kit CB 299T HR-107 B

$1650.01

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COMP Cams Big Mutha' Thumpr hydraulic roller camshaft kit for Chevrolet Big Block 396-454 engines. Requires supporting modifications for street/strip use.

Key Features

Fits a wide range of Chevrolet Big Block 396-454 engines.
Hydraulic roller camshaft design for improved performance and durability.
Intake duration is 243 degrees and exhaust duration is 257 degrees.
Requires a minimum 9.5:1 compression ratio for optimal performance.
Recommends a torque converter with a 2800+ RPM stall speed.
Designed for street/strip applications.

⚠️ 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 Big Mutha' Thumpr camshaft kit features a 243/257 degree intake/exhaust duration profile, designed for hydraulic roller lifters. It's built for Chevrolet Big Block engines, specifically the 396 to 454 cubic inch displacements. This kit is intended for street/strip applications where aggressive performance is desired.

To get the most out of this camshaft, you'll need to ensure your engine is set up correctly. It requires a minimum of 9.5:1 compression ratio to achieve proper combustion and power. Additionally, a torque converter with at least a 2800 RPM stall speed is recommended to keep the engine in its power band during acceleration. You'll also need to pair it with a suitable intake manifold, appropriate gearing in your rear differential, and performance headers to allow the engine to breathe freely. Expect a very rough idle with this camshaft, which is characteristic of its aggressive nature and performance focus.

This kit is compatible with 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. It's important to note that this camshaft is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for complete details on setup and compatibility.