What is the ratio of these rocker arms?

These COMP Cams Ultra Pro Magnum XD rocker arms have a 1.73 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 using 7/16 inch studs. This is a common size for many Chevrolet Big Block applications.

Are any other parts needed for installation?

While these rocker arms are a direct stud mount design, it's always recommended to consult the manufacturer's installation instructions for any specific hardware or setup requirements. Ensure your valve springs and retainers are compatible with the 1.73 ratio.

COMP Cams Rocker Arms 1.73 Ratio 7/16in Stud CB 1823-8

Name: COMP Cams Rockers CB 1.73 7/16in Ultra Pro
Brand: COMP Cams
Price: 383.27 USD
Availability: InStock

COMP Cams Rockers CB 1.73 7/16in Ultra Pro

$383.27

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, 1.73 ratio, 7/16in stud. Built from 8650 steel for durability and longevity.

Key Features

Fits a wide range of Chevrolet Big Block engines, including 1963-1976 Impala, 1965-1973 Chevelle, and 1967-1972 Camaro.
Constructed from durable 8650 steel for superior longevity compared to lesser rockers.
Features a unique machined billet pushrod seat insert for enhanced durability.
Includes precision-sorted needle bearings and hardened roller tips to reduce wear and distribute load.
Fully rebuildable stud mount design for easier maintenance over time.
XD design optimized for strength and stiffness using advanced FEA and CAD analysis.

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Will this fit your vehicle?

Product Details

Starting with a durable 8650 steel construction, these COMP Cams Ultra Pro Magnum XD rocker arms are built to last. They feature a unique machined billet pushrod seat insert for exceptional durability, and the set includes precision-sorted needle bearings and hardened roller tips. These design choices help distribute load effectively and reduce wear, leading to a longer service life for your engine's valvetrain. This set of eight rocker arms is designed for Chevrolet Big Block engines with 7/16 inch studs and a 1.73 ratio.

These stud mount rockers are also fully rebuildable, offering a practical advantage for long-term maintenance. The XD design benefits from advanced FEA and CAD analysis, which helps optimize strength and stiffness for demanding applications like endurance, drag, and circle track racing. They are designed to work with most spring and retainer diameters, making them a versatile choice for a range of builds. This set fits a wide variety of Chevrolet vehicles from the mid-60s to the mid-70s, including popular models like the Chevelle, Camaro, and Impala.