What kind of idle can I expect with this camshaft?

This COMP Cams Xtreme Energy camshaft is designed to provide a good, stable idle. While it's a performance camshaft, it's tuned to remain manageable for daily driving without excessive roughness.

What is a hydraulic flat tappet camshaft?

A hydraulic flat tappet camshaft uses hydraulic lifters that automatically maintain zero valve lash. This means they self-adjust as the engine warms up and cools down, simplifying maintenance compared to solid lifter camshafts.

Will this camshaft work with my existing valve springs and lifters?

While this camshaft is designed for hydraulic flat tappet systems, it's always recommended to check the manufacturer's specifications for compatibility with your existing valve springs and lifters. Performance camshafts often benefit from upgraded valvetrain components to ensure reliability and optimal performance.

COMP Cams Hydraulic Flat Tappet Camshaft XE256H-10 51-221-4

Name: COMP Cams Camshaft P8 XE256H-10
Brand: COMP Cams
Price: 331.32 USD
Availability: InStock

COMP Cams Camshaft P8 XE256H-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 XE256H-10 camshaft for Pontiac 265-455 V8s. Boosts low-end and mid-range torque with a good idle.

Key Features

Fits a wide range of Pontiac, Buick, and Oldsmobile V8 engines from 1955-1981.
Xtreme Energy XE256H-10 profile offers 212 degrees of intake and 218 degrees of exhaust duration.
Designed to increase torque in the low and mid-range RPMs.
Maintains a good, stable idle for everyday drivability.
Hydraulic flat tappet design for automatic valve lash adjustment.
Well-built camshaft from a popular performance parts manufacturer.

⚠️ 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 get more grunt out of your Pontiac V8, this COMP Cams Xtreme Energy camshaft is a solid option. It's designed to give you a noticeable boost in torque from the low end all the way through the mid-range, which really helps when you're accelerating from a stop or just cruising around town. Plus, it's built to maintain a good, stable idle, so you won't have to worry about it running rough.

This camshaft is a hydraulic flat tappet design, meaning it uses hydraulic lifters to automatically adjust for valve lash. It's a well-built piece from COMP Cams, a popular name in performance camshafts, and it's specifically tuned for Pontiac engines ranging from 265 cubic inches up to the big 455. You can expect a strong improvement in how your engine pulls, making it feel much more responsive.

This camshaft fits a wide variety of Pontiac, Buick, and Oldsmobile V8s from the late 50s through the early 80s, including popular models like the Firebird, Grand Prix, and LeMans. While it offers a good idle, remember that any camshaft upgrade might require adjustments to your fuel and ignition systems to get the most out of it and ensure optimal performance.