What is the ratio of these rocker arms?

These COMP Cams Ultra Pro Magnum XD rocker arms have a 1.5 ratio. This ratio affects how much the valve opens relative to the camshaft lobe lift.

What size stud do these rocker arms use?

These rocker arms are designed for engines that use 3/8-inch rocker arm studs. It's important to ensure your engine's studs match this size for proper installation.

Are these rocker arms compatible with aftermarket camshafts?

While these rocker arms are designed to work with most common spring and retainer diameters, compatibility with aftermarket camshafts depends on the specific camshaft's lift and duration specifications. It's always best to consult your camshaft manufacturer's recommendations.

COMP Cams Rocker Arms 1.5 Ratio 3/8in Stud 1801-8

Name: COMP Cams Rockers CS 1.5 3/8in Ultra Pro
Brand: COMP Cams
Price: 325.94 USD
Availability: InStock

COMP Cams Rockers CS 1.5 3/8in Ultra Pro

$325.94

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 Ultra Pro Magnum XD rocker arms for Chevy V8s. Features durable steel construction and roller tips for improved valve train life.

Key Features

Fits a wide range of Chevrolet, Buick, Cadillac, and GMC vehicles.
Set includes 8 rocker arms with a 1.5 ratio and 3/8-inch stud size.
Constructed from durable 8650 steel for long service life.
Features a unique machined billet pushrod seat insert for added durability.
Equipped with precision-sorted needle bearings and hardened roller tips to reduce wear.
Fully rebuildable stud-mount design.

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Will this fit your vehicle?

Product Details

If you're rebuilding the top end of your small-block Chevy engine, paying attention to the rocker arms is key for proper valve operation. These Ultra Pro Magnum XD rocker arms from COMP Cams are a well-built option designed to handle the demands of performance engines. They are built from strong 8650 steel, which is known for its durability and ability to outlast many other rocker arm materials.

What sets these apart is the unique machined billet pushrod seat insert, adding exceptional durability right where it counts. The rocker arms feature precision-sorted needle bearings and hardened roller tips. This setup helps to better distribute the load across the valve train and reduces wear, leading to a longer service life for your components. They are also designed to work with most common spring and retainer diameters, making them adaptable to various builds. These stud-mount rockers are fully rebuildable, offering a long-term solution for your engine.

This set of eight rocker arms is designed for engines using 3/8-inch studs and features a 1.5 ratio. They are a solid option for a wide range of Chevrolet, Buick, Cadillac, and GMC vehicles from the 1950s through the 1990s, including popular models like the Chevrolet Camaro, Corvette, and Caprice, as well as the Buick Skylark and Regal. Make sure to check the fitment data to confirm compatibility with your specific vehicle.