What makes the Ultra Pro Magnum XD rocker arms different from other rocker arms?

These rocker arms feature a unique machined billet pushrod seat insert and are constructed from durable 8650 steel. They also utilize precision-sorted needle bearings and hardened roller tips to improve load distribution and reduce wear for a longer service life.

Are these rocker arms compatible with my existing valve springs and retainers?

Yes, these Ultra Pro Magnum XD rocker arms are designed to work with most common diameter springs and retainers, which helps simplify installation into your existing valvetrain setup.

What does the 'XD' designation mean for these rocker arms?

The XD design signifies that these rocker arms were developed using advanced FEA and CAD analysis. This process was used to optimize their strength, stiffness, and moment of inertia, particularly for endurance and circle track applications.

COMP Cams Rocker Arms 1.55 Ratio 7/16in Stud 1808-8

Name: COMP Cams Rockers CS 1.55 7/16in Ultra Pro
Brand: COMP Cams
Price: 383.07 USD
Availability: InStock

COMP Cams Rockers CS 1.55 7/16in Ultra Pro

$383.07

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. Built from 8650 steel with a unique pushrod seat insert for durability. Fits many Chevrolet, Buick, and Cadillac engines.

Key Features

Fits a wide range of Chevrolet, Buick, and Cadillac vehicles.
Constructed from durable 8650 steel for extended service life.
Features a unique machined billet pushrod seat insert for exceptional durability.
Includes precision-sorted needle bearings and hardened roller tips to reduce wear.
Rocker arms are fully rebuildable.
Designed to work with most common spring and retainer diameters.

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Will this fit your vehicle?

Product Details

Starting with a unique machined billet pushrod seat insert, these COMP Cams Ultra Pro Magnum XD rocker arms are built for serious durability. They are constructed from tough 8650 steel, which is known to outlast and outperform many other rocker arms on the market. This set includes 8 rocker arms, each featuring a 1.55 ratio and designed for a 7/16 inch stud, making them a solid option for a wide range of Chevrolet, Buick, and Cadillac engines from the 1950s through the 1990s.

Beyond the strong steel construction and the durable pushrod seat, these rocker arms incorporate precision-sorted needle bearings and hardened roller tips. These features work together to better distribute valve spring loads and reduce wear, which translates to a longer service life for your engine's valvetrain. They are also designed to work with most common spring and retainer diameters, simplifying installation. The XD design itself was developed using advanced FEA and CAD analysis to optimize strength, stiffness, and moment of inertia, especially for endurance and circle track applications.

This set of 8 rocker arms is fully rebuildable, offering a long-term solution for your engine build. If you're working on a classic Chevrolet, a Buick Skylark, or a Cadillac Brougham, these well-built rocker arms can help ensure your valvetrain performs reliably.