What kind of compression ratio is recommended for this camshaft?

For optimal performance with this drag race camshaft, COMP Cams recommends a compression ratio of approximately 11.5:1. This helps ensure sufficient cylinder pressure to take full advantage of the cam's aggressive profile.

What other components are typically needed when installing this camshaft?

When installing a hydraulic roller camshaft like this one, it's crucial to ensure your valvetrain components are compatible. This often includes roller lifters, roller rocker arms, and potentially upgraded valve springs to handle the increased lift and RPM. Always consult the manufacturer's installation guide for specific recommendations.

Does this camshaft come with a break-in procedure or warranty information?

COMP Cams provides detailed installation and break-in procedures with their camshafts. While specific warranty details can vary, it's always best to follow the manufacturer's instructions precisely to ensure proper operation and to maintain any applicable warranty coverage.

COMP Cams Hydraulic Roller Camshaft 11-872-11

Name: COMP Cams Camshaft CB 325QnHR-12
Brand: COMP Cams
Price: 569.86 USD
Availability: InStock

COMP Cams Camshaft CB 325QnHR-12

$569.86

On Backorder

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COMP Cams CB 325QnHR-12 camshaft for Chevrolet Big Block 396-454 engines. Serious drag race cam.

Key Features

Fits Chevrolet Big Block 396-454 engines originally equipped with flat tappet camshafts.
Hydraulic roller camshaft design for improved valvetrain efficiency and performance.
Intake duration at .050 inch lift is 271 degrees; exhaust duration is 283 degrees.
Features a 112-degree lobe separation angle.
Recommended for serious bracket race applications with 11.5:1 compression and good cylinder heads.
Not CARB approved and cannot be shipped to California.

⚠️ 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 hydraulic roller camshaft, part number 11-872-11, features a 271-degree intake duration and a 283-degree exhaust duration at .050 inch lift, with a 112-degree lobe separation angle. This specific grind is intended for serious bracket racing applications, particularly on 454 cubic inch Chevrolet Big Block engines. To get the most out of this cam, you'll want to pair it with good cylinder heads and a compression ratio around 11.5:1, ensuring you have the airflow and cylinder pressure needed to make this cam perform.

Designed as a drag race camshaft, this piece is built for engines that will see high RPM use and demand consistent performance lap after lap. The hydraulic roller design means less friction and more efficient valve train operation compared to flat tappet cams, allowing for more aggressive lobe profiles and better performance. It's important to note that this camshaft is not CARB approved and cannot be shipped to California. For optimal results and longevity, always refer to the manufacturer's installation instructions, which will detail necessary break-in procedures and any specific valvetrain components recommended for this application.

This camshaft fits a wide range of Chevrolet Big Block engines, including popular models like the Chevrolet Impala, Chevelle, and Camaro from the late 1960s through the mid-1970s, as well as many truck applications. Ensure your engine is set up with the appropriate cylinder heads and compression to match the aggressive nature of this drag race camshaft for the best possible outcome on the track.