What is the ratio of these rocker arms?

These COMP Cams Ultra Pro Magnum XD rocker arms feature a 1.65 ratio. This ratio affects valve lift and duration, allowing for potentially improved engine performance.

What material are these rocker arms made from?

They are machined from strong 8650 steel and include a unique machined billet pushrod seat insert for enhanced durability and longevity.

Are these rocker arms compatible with all valve springs?

These rocker arms are designed to work with most common diameter springs and retainers. They can also handle spring pressures up to 1,000 lbs.

COMP Cams Ultra Pro Magnum XD Rocker Arms 1803-16

Name: COMP Cams Rockers CS 1.65 3/8in Ultra Pro
Brand: COMP Cams
Price: 677.76 USD
Availability: InStock

COMP Cams Rockers CS 1.65 3/8in Ultra Pro

$677.76

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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 Ultra Pro Magnum XD rocker arms. Built from 8650 steel with a 1.65 ratio for Small Block Chevy engines.

Key Features

Fits a wide range of Chevrolet and Buick V8 engines.
Constructed from durable 8650 steel for long 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.
Fully rebuildable design allows for maintenance and extended use.
Can handle spring pressures up to 1,000 lbs.

⚠️ 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 engine components that help racers and enthusiasts get the most out of their vehicles. These Ultra Pro Magnum XD rocker arms are a prime example of their commitment to durability and performance. They are designed to handle the demands of high-performance engines, whether you're building for endurance, drag racing, or circle track. These rocker arms fit a wide range of Chevrolet and Buick V8 engines, including popular models like the Chevrolet Camaro, Chevrolet Corvette, and Buick Regal.

These rocker arms are machined from strong 8650 steel, a material chosen for its ability to withstand significant stress. They feature a unique machined billet pushrod seat insert for added durability, and the entire set is fully rebuildable. Precision-sorted needle bearings and hardened roller tips work together to distribute loads effectively and reduce wear, which means a longer service life for your engine. They are built to work with most common spring and retainer diameters and can handle spring pressures up to 1,000 lbs. The XD design incorporates advanced FEA and CAD development to optimize strength, stiffness, and inertia for demanding applications.

This set includes rocker arms with a 1.65 ratio, designed for use with 3/8-inch studs on Chevrolet 265-400 cubic inch Small Block engines. When installing, remember to refer to the manufacturer's installation instructions for specific details regarding proper setup and any required hardware.