What is the intended use for this camshaft?

This COMP Cams CS X4 280HR-11 camshaft is designed for performance builds of Chevrolet Gen 1 Small Block engines. It focuses on delivering strong mid-range power, making it suitable for applications where improved acceleration and responsiveness are desired.

How can I tell if my engine is compatible with this camshaft?

This camshaft fits many Chevrolet Gen 1 Small Blocks, but not LT1/LT4 or factory roller blocks from 1985 onward. You may need to remove the intake or timing cover to confirm if your engine uses a factory roller or flat tappet setup. Early 1955-1957 265 engines might need a specific oiling groove on the 5th cam journal.

What other components are recommended for this camshaft?

For optimal performance with this camshaft, it's recommended to use headers, a gear ratio between 3.73 and 4.10, and a torque converter with a stall speed of 2500 RPM or higher. These components help the engine utilize the camshaft's powerband effectively.

COMP Cams CS X4 280HR-11 Hydraulic Roller Camshaft 12-414-8

Name: COMP Cams Camshaft CS X4 280HR-11
Brand: COMP Cams
Price: 579.17 USD
Availability: InStock

COMP Cams Camshaft CS X4 280HR-11

$579.17

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 CS X4 280HR-11 hydraulic roller camshaft for Chevrolet Small Block Gen 1 engines. Boosts mid-range power for performance builds.

Key Features

Fits Chevrolet GEN 1 Small Blocks including 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400.
Hydraulic roller camshaft design for improved performance and durability.
Features 230 degrees intake and 234 degrees exhaust duration at .050 lift.
Offers .495 inch intake and .501 inch exhaust lift.
Designed to provide strong mid-range power.
Requires headers, 3.73-4.10 gears, and a 2500+ RPM stall torque converter for optimal performance.

⚠️ 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

If you're looking to build a performance Chevrolet Small Block engine and want to really wake up the mid-range power, this COMP Cams CS X4 280HR-11 camshaft is a solid choice. This hydraulic roller camshaft is designed for Chevrolet Gen 1 Small Block engines, offering a strong pull from the mid-RPM range. It's a popular option for those rebuilding or modifying engines like the 350, 400, or even the classic 283 and 327, aiming for a noticeable improvement in acceleration and responsiveness.

This camshaft features a 230-degree intake and 234-degree exhaust duration at .050 lift, with a .495-inch intake and .501-inch exhaust lift. Because it's a hydraulic roller design, it offers better performance and durability than older flat-tappet cams. To get the most out of this cam, you'll want to pair it with headers, a gear ratio in the 3.73 to 4.10 range, and a torque converter with at least a 2500 RPM stall speed. Be aware that this camshaft will produce a rougher idle, which is typical for performance cams of this size, and it's not CARB approved, so it cannot be shipped to California.

It's important to confirm your engine's setup before ordering. This camshaft fits many Chevrolet Gen 1 Small Blocks, including popular displacements like the 262, 265, 267, 283, 302, 305, 307, 327, 350, and 400. However, it does not fit LT1/LT4 engines or factory roller Small Blocks from 1985 and newer. GM gradually introduced roller camshafts, so you may need to remove the intake or timing cover to verify if your block is a factory roller or flat tappet. Engines from 1955-1957 with a 265 displacement may require a groove on the 5th cam journal for proper oiling.