What kind of power gains can I expect with this camshaft?

This camshaft is designed to deliver good top-end power. For best results, it should be paired with a well-flowing intake, headers, and appropriate rear-end gears. The manufacturer suggests using it with a 9.5:1 compression ratio and a 2500+ stall torque converter.

Does this camshaft come with everything needed for installation?

This listing is for the camshaft itself. It is recommended to consult the manufacturer's installation instructions for a complete list of required components and procedures, which may include lifters, pushrods, and valve springs compatible with the camshaft's specifications.

Are there any restrictions on where this camshaft can be shipped?

Yes, this camshaft is not CARB approved and cannot be shipped to California due to emissions regulations. It is also subject to California's Proposition 65 warning.

COMP Cams Camshaft CB X4 278H-11 11-243-4

Name: COMP Cams Camshaft CB X4 278H-11
Brand: COMP Cams
Price: 323.69 USD
Availability: InStock

COMP Cams Camshaft CB X4 278H-11

$323.69

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 Xtreme 4x4 camshaft for Chevy Big Block 396-454 engines. Delivers good top end power.

Key Features

Fits Chevrolet Big Block 396-454 engines originally equipped with flat tappet camshafts.
Designed to provide good top-end power.
Hydraulic flat tappet design for reliable performance.
Manufacturer recommends use with 9.5:1 compression and a 2500+ stall converter.
Requires a good intake, headers, and gears to achieve optimal performance.
Part number 11-243-4.

⚠️ 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

COMP Cams is well-known for performance engine components, and their Xtreme 4x4 line is built for trucks and heavy-duty applications. This CB X4 278H-11 camshaft is designed to give your Chevrolet Big Block engine good top-end power, making it a solid choice if you're looking to improve performance on the street or at the strip. It's specifically intended for engines originally equipped with flat tappet camshafts.

To get the most out of this camshaft, you'll want to pair it with a good intake system, headers, and appropriate rear-end gears. The manufacturer recommends using it with a 9.5:1 compression ratio and a torque converter with a 2500+ stall speed. This setup helps ensure the camshaft can breathe properly and transfer its power effectively to the drivetrain. The camshaft itself is a hydraulic flat tappet design, offering a balance of performance and reliability for these classic V8s.

This camshaft fits a wide range of Chevrolet vehicles, including popular models like the C10 Pickup, Camaro, and Impala from the late 60s through the mid-70s, as well as later models up to the mid-90s for some C/K series trucks. Please note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper setup and break-in procedures.