What material are these rocker arms made from?

These Ultra Pro Magnum XD rocker arms are machined from durable 8650 steel. This material is chosen for its strength and ability to withstand high stress and wear over time.

What is the purpose of the billet pushrod seat insert?

The unique machined billet pushrod seat insert offers exceptional durability at a critical contact point. It helps to better distribute the load and reduce wear, contributing to a longer service life for the rocker arm.

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

These stud mount rockers are designed to work with most common diameter springs and retainers. However, it's always a good idea to verify compatibility with your specific valvetrain components.

COMP Cams Rocker Arms 1.7 Ratio 3/8in Stud Mount 1833-16

Name: COMP Cams Rockers FS 1.7 3/8in Ultra Pro
Brand: COMP Cams
Price: 676.42 USD
Availability: InStock

COMP Cams Rockers FS 1.7 3/8in Ultra Pro

$676.42

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. 1.7 ratio, 3/8in stud, 8650 steel construction. Fits many Ford V8 engines.

Key Features

Fits a wide range of Ford vehicles including the 289, 302, and 351 Windsor engines.
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 distribute load and reduce wear.
1.7 ratio rocker arms designed for 3/8 inch studs.
Can handle up to 1,000 lbs of spring pressure.

⚠️ 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 durable, high-performing parts. They are built from tough 8650 steel, which is known for its strength and ability to withstand the rigors of engine operation, outlasting many other rocker arms on the market. The inclusion of a unique machined billet pushrod seat insert adds another layer of durability, ensuring this critical contact point holds up over time.

Designed for stud mounting and featuring a 1.7 ratio, these rockers are engineered to work with most common spring and retainer diameters, making them adaptable to a variety of engine builds. The precision-sorted needle bearings and hardened roller tips are key features that help distribute valve spring loads more effectively. This not only reduces wear on the rocker arm itself but also contributes to a longer overall service life for your valvetrain. COMP Cams utilized advanced FEA and CAD analysis to optimize the strength, stiffness, and inertia of these rockers, making them suitable for demanding applications like endurance, drag, and circle track racing.

This set is designed to fit a wide range of Ford V8 engines, including popular models like the Ford 289, 302, and 351 Windsor, as well as many other Ford vehicles from the 1960s through the 1990s. They are fully rebuildable, meaning you can service them if needed, further extending their lifespan. If you're looking to upgrade your valvetrain with components that offer improved strength and longevity, these COMP Cams rocker arms are a solid option.