What kind of idle can I expect with this camshaft?

This Xtreme Energy camshaft is designed for performance and will produce a rougher idle compared to a stock camshaft. This is typical for cams with this duration, as they allow for more overlap and improved cylinder filling at higher RPMs.

What other modifications are recommended when installing this camshaft?

For optimal performance, it's recommended to have at least 9:1 compression, headers, and a torque converter with a stall speed of 2800 RPM or higher. Performance gears are also suggested to help match the engine's power band.

Is this camshaft compatible with my California-registered vehicle?

No, this camshaft is not CARB approved and cannot be legally shipped to California due to emissions regulations.

COMP Cams Hydraulic Flat Camshaft XE284H-10 51-225-4

Name: COMP Cams Camshaft P8 XE284H-10
Brand: COMP Cams
Price: 331.32 USD
Availability: InStock

COMP Cams Camshaft P8 XE284H-10

$331.32

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams Xtreme Energy camshaft for Pontiac 265-455 V8 engines. Street/strip performance, requires 9:1+ compression.

Key Features

Fits 1955-1981 Pontiac, 1977-1980 Buick, and 1979 Oldsmobile V8 engines.
Xtreme Energy hydraulic flat tappet camshaft with 240/246 degrees duration at .050 inch lift.
Designed for street and strip applications, requiring 9:1+ compression.
Works best with headers, performance gears, and a 2800+ RPM stall torque converter.
Provides a rough idle and a power band that starts above 2800 RPM.
This part is 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

COMP Cams is well-known for making performance valvetrain components that help you get the most out of your engine. This Xtreme Energy camshaft is built for Pontiac V8 engines, specifically those in the 265 to 455 cubic inch range, and is designed for street and strip applications. It’s a hydraulic flat tappet design, meaning it uses oil pressure to adjust valve lash automatically, simplifying maintenance compared to solid lifter cams.

This camshaft features a 240-degree intake duration and 246-degree exhaust duration at .050 inch lift, which is a notable step up from stock cams. To make the most of this improved airflow, you'll want at least 9:1 compression, headers, and a rear gear ratio that complements the cam's powerband. Expect a rougher idle and a power band that really comes alive above 2800 RPM, making it a solid choice for drivers looking for a noticeable boost in performance on the street and at the drag strip.

This camshaft fits a wide range of Pontiac, Buick, and Oldsmobile vehicles from the late 1950s through the early 1980s, including popular models like the Pontiac Firebird, Grand Prix, and LeMans. Be aware that this part is not CARB approved and cannot be shipped to California.