What is the spring pressure rating for these rocker arms?

These Ultra Pro Magnum XD rocker arms are designed to handle up to 1,000 lbs of spring pressure. This makes them suitable for engines with stiffer valve springs often found in performance applications.

Are these rocker arms compatible with all valve springs and retainers?

They are designed to work with most common diameter springs and retainers. However, it's always recommended to verify compatibility with your specific spring and retainer setup to ensure proper geometry and clearance.

What does the 'XD' in Ultra Pro Magnum XD mean?

The 'XD' designation signifies an updated design that utilizes advanced FEA and CAD analysis. This optimization focuses on improving the rocker arms' strength, stiffness, and moment of inertia for enhanced endurance and performance.

COMP Cams Rocker Arms 1804-16 - Small Block Chevy

Name: COMP Cams Rockers CS 1.5 7/16in Ultra Pro
Brand: COMP Cams
Price: 665.60 USD
Availability: InStock

COMP Cams Rockers CS 1.5 7/16in Ultra Pro

$665.60

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 Small Block Chevy engines. 1.5 ratio, 7/16" stud. Built for durability.

Key Features

Fits a wide range of Chevrolet Small Block engines from 265 to 400 cubic inches.
Features a 1.5 rocker arm ratio for improved valve lift.
Designed for use with 7/16-inch rocker arm studs.
Constructed from durable 8650 steel for long service life.
Includes a unique machined billet pushrod seat insert for added strength.
Utilizes precision-sorted needle bearings and hardened roller tips to reduce wear.

⚠️ 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 working on a Chevrolet Small Block engine, these COMP Cams Ultra Pro Magnum XD rocker arms are a solid choice for rebuilding or upgrading your valvetrain. They feature a 1.5 ratio and are designed to work with 7/16-inch studs, fitting a wide range of applications from the 265 cubic inch up to the 400 cubic inch engines. You'll find these on many popular vehicles like the Chevrolet Camaro, Corvette, and Chevelle, as well as various Buick and Cadillac models from the 70s and 80s.

These rockers are built from durable 8650 steel, which is known for its strength and ability to withstand the demands of a performance engine. COMP Cams has added a unique machined billet pushrod seat insert for even more durability where it counts. They also incorporate precision-sorted needle bearings and hardened roller tips. This design helps to better distribute the load across the valvetrain components, reducing wear and extending the service life of the rocker arms. They are also designed to be fully rebuildable, meaning you can service them down the line if needed. The XD design itself has been optimized using advanced computer modeling to improve strength and stiffness, making them suitable for endurance racing, drag strip use, and circle track applications. They can handle spring pressures up to 1,000 lbs and work with most common spring and retainer diameters.

When installing these, remember they are stud-mount rockers and require the correct 7/16-inch studs. It's always a good idea to check your valve springs and retainers to ensure they are compatible with the 1.5 ratio and the overall geometry of the new rocker arms. This set includes 16 rocker arms, enough for a complete V8 engine.