What kind of idle can I expect with this camshaft?

This COMP Cams camshaft is designed to produce a choppy idle. This is a common characteristic of performance camshafts and indicates that the engine is set up for increased power output.

What other components are recommended for this camshaft installation?

For optimal performance, this camshaft is recommended for use with a torque converter with a stall speed of 2000 RPM or higher and a rear gear ratio of 3.73. These components help ensure the engine stays in its power band.

Are there any specific engine models this camshaft will NOT fit?

Yes, this camshaft is not compatible with 1965-1966 396 Big Block engines that have an oiling groove in the rear journal. If your engine has this feature, you will need a different camshaft.

COMP Cams Camshaft CB Nx 268H-13N2O 11-560-4

Name: COMP Cams Camshaft CB Nx 268H-13
Brand: COMP Cams
Price: 323.69 USD
Availability: InStock

COMP Cams Camshaft CB Nx 268H-13

$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 camshaft for Chevrolet Big Block 396-454 engines. Designed for street machines with nitrous kits, offering a choppy idle.

Key Features

Fits 1967-1993 Chevrolet vehicles originally equipped with flat tappet camshafts.
Hydraulic flat tappet camshaft with 224 intake and 236 exhaust duration at .050 inch lift.
Designed for street machines with 125+ hp nitrous kits.
Requires a 2000+ RPM stall torque converter and 3.73 gear ratio for optimal performance.
Produces a choppy idle characteristic of performance camshafts.
Suitable for Chevrolet Big Block 396-454 cubic inch engines.

⚠️ 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

COMP Cams is well-known for performance engine components, and their CB Nx 268H-13 camshaft is built for street machines looking to add serious power, especially with a nitrous kit. This hydraulic flat tappet camshaft is designed for Chevrolet Big Block engines, specifically the 396 to 454 cubic inch displacements. It's engineered to work with a 2000+ RPM stall torque converter and 3.73 rear gears, and you can expect a noticeable, choppy idle that signals its performance intent.

This camshaft features a 224 intake and 236 exhaust duration at .050 inch lift, making it a solid choice for builds aiming for 125+ horsepower gains from a nitrous system. The design focuses on delivering improved performance for street applications where a strong mid-range and top-end pull is desired. It's important to note that this camshaft is not CARB approved and cannot be shipped to California. Also, be aware that 1965-66 396 Big Block engines with an oiling groove in the rear journal require a different camshaft; please contact us if your engine falls into that specific category.