What is the recommended compression ratio for this camshaft?

This camshaft is designed for engines with approximately 9:1 compression. Using a different compression ratio may affect performance and require adjustments to other engine components.

What type of valve springs and torque converter are recommended?

It is recommended to use a torque converter with at least a 2200 RPM stall speed. You will also need to ensure you have compatible valve springs that can handle the camshaft's lift specifications.

Can this camshaft be used in engines that originally had flat tappet camshafts?

Yes, this is a retro-fit hydraulic roller camshaft, meaning it can be installed in older LA engines that originally came with flat tappet camshafts, offering the benefits of roller technology.

COMP Cams Hydraulic Roller Camshaft XR274HR-10 20-811-9

Name: COMP Cams Camshaft CRS XR274HR-10
Brand: COMP Cams
Price: 604.45 USD
Availability: InStock

COMP Cams Camshaft CRS XR274HR-10

$604.45

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COMP Cams Xtreme Energy hydraulic roller camshaft for Chrysler 273-360 LA engines. Designed for high performance street use.

Key Features

Fits Chrysler 273, 318, 340, and 360 LA engines.
Xtreme Energy hydraulic roller camshaft design.
Intake duration at .050 inch lift is 224 degrees; exhaust duration is 230 degrees.
Designed for high performance street applications.
Optimized for use with 3.55-4.10 gear ratios and 2200+ RPM stall torque converters.
Requires approximately 9:1 compression and headers for best 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

This COMP Cams Xtreme Energy camshaft features a 224-degree intake and 230-degree exhaust duration at .050 inch lift, utilizing a hydraulic roller design. This specific camshaft is intended for Chrysler LA-series engines, including the 273, 318, 340, and 360 cubic inch V8s. Its specifications are geared towards a high-performance street application, making it a solid choice for builders looking to extract more power from their Mopar V8.

The XR274HR-10 is designed to work with a variety of rear axle gear ratios, from 3.55 to 4.10, and requires a torque converter with at least a 2200 RPM stall speed. It's also optimized for engines with approximately 9:1 compression and the use of headers. This camshaft is a retro-fit hydraulic roller, meaning it can be installed in older engines that originally came with flat tappet camshafts, offering the benefits of roller technology without needing a complete engine block modification. Ensure you have the correct valve springs and pushrods to match the camshaft's lift and operating range.

This camshaft fits a wide range of Chrysler, Dodge, and Plymouth vehicles from the 1960s through the 1990s, including models like the Dodge Challenger, Plymouth Barracuda, and Chrysler Cordoba. For optimal performance and reliability, it's recommended to consult the manufacturer's installation instructions for valve spring and pushrod recommendations, as well as proper break-in procedures.