What type of lifters does this camshaft use?

This COMP Cams camshaft is designed for hydraulic flat tappet lifters. It is not compatible with factory roller camshaft systems found in some later model engines.

What is the recommended compression ratio and setup for this camshaft?

For optimal performance, this camshaft is recommended for engines with approximately 9.5:1 compression and equipped with headers. It's well-suited for applications like bracket racing or high-performance street use.

How do I know if my engine is compatible with this camshaft?

This camshaft fits Chevrolet GEN 1 Small Blocks originally equipped with hydraulic flat tappet lifters. You will need to verify if your specific engine block uses a flat tappet valvetrain, as it does not fit factory roller setups or LS-based engines.

COMP Cams Camshaft CS XM 290H-12 | 12-248-4

Name: COMP Cams CamshaftCS XM 290H-12
Brand: COMP Cams
SKU: comp-cams-comp-cams-camshaftcs-xm-290h-12-t14-4390150
Price: 320.45 USD
Availability: BackOrder

COMP Cams CamshaftCS XM 290H-12

$320.45

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 XM 290H-12 camshaft for Chevy Small Block engines. Improves performance for bracket racing and high-performance applications.

Key Features

Fits Chevrolet GEN 1 Small Blocks from 262 to 400 cubic inches.
Designed for hydraulic flat tappet lifters.
Features 246 degrees intake and 256 degrees exhaust duration at .050 lift.
Recommended for engines with 9.5:1 compression and headers.
Suitable for bracket racing and high-performance street applications.
Compatible with a wide range of vehicles including Chevrolet Camaro, Corvette, and C10 trucks.

⚠️ 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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Product Details

If you're looking to get more out of your classic Chevrolet Small Block engine, especially for bracket racing or high-performance street use, a camshaft upgrade can make a big difference. This COMP Cams CS XM 290H-12 camshaft is designed for engines originally equipped with hydraulic flat tappet lifters, fitting a wide range of Chevy Small Blocks from 262 to 400 cubic inches, commonly found in vehicles like the Chevrolet Camaro, Corvette, and C10 trucks from the 1950s through the early 2000s.

This camshaft features a 246/256 degree intake/exhaust duration at .050 lift, which is a popular choice for adding noticeable power without making the engine too difficult to manage. It's well-suited for applications with around 9.5:1 compression and headers, like a jet boat with an 'A' impeller, or a street/strip car. The hydraulic flat tappet design means it uses a proven valvetrain system that's straightforward to install, provided your engine block is set up for it. Remember to verify if your specific engine uses a flat tappet or factory roller setup, as this cam is only compatible with flat tappet systems.

For optimal performance, this camshaft works best with engines that have headers and a compression ratio around 9.5:1. It's a solid option for those building a performance engine for bracket racing or spirited driving, offering an improved powerband over stock camshafts.