What is the primary benefit of using rocker arms designed for 1/2" studs?

Rocker arms designed for 1/2" studs provide a stiffer valve train. This increased stiffness helps achieve maximum valve motion and improves overall valve train stability, especially in high-performance big block Chevrolet engines.

What material are these COMP Cams rocker arms made from?

These Ultra Pro Magnum rocker arms are constructed from 8650 chromemoly steel. They are finished with a black oxide coating for added durability and corrosion resistance.

What is the recommended installation procedure for these rocker arms?

COMP Cams recommends using these Ultra Pro Magnum rocker arms in conjunction with their Hi-Tech 1/2" Rocker Stud Kit for optimal performance and valve train stability. Always refer to the manufacturer's installation instructions for detailed guidance.

COMP Cams Rocker Arms 1.7 Ratio 1/2in Ultra 1625-16

Name: COMP Cams Rocker Arms CB 1.7 1/2in Ultra
Brand: COMP Cams
Price: 665.28 USD
Availability: InStock

COMP Cams Rocker Arms CB 1.7 1/2in Ultra

$665.28

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 rocker arms with 1.7 ratio for BBC engines. Built for 1/2" studs to increase valve train stiffness.

Key Features

Fits 11+ vehicle make/model combinations including Chevrolet and GMC.
Features a 1.7 ratio for increased valve lift.
Built from 8650 chromemoly steel with a black oxide coating.
Designed to accept 1/2" rocker studs for improved valve train stiffness.
Can withstand spring pressures up to 850 lbs.
Includes precision-sorted needle bearings and hardened roller tips.

⚠️ 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 big block Chevrolet engine and looking for improved valve train stability, these Ultra Pro Magnum rocker arms from COMP Cams are a solid option. They are specifically built to work with 1/2" rocker studs, which is a key upgrade for BBC engines that helps achieve maximum valve motion. This set is designed for engines like the Chevrolet 396 through 454, and many other big block applications, offering a 1.7 ratio for increased lift.

These rockers are constructed from 8650 chromemoly steel with a black oxide coating, making them well-built to handle spring pressures up to 850 lbs. COMP Cams uses a modern, web-like design that increases strength and rigidity while also reducing the moment of inertia. This means the rocker arm is more stable during operation, which is crucial for consistent valve timing. They also feature precision-sorted needle bearings and hardened roller tips for smooth operation and durability.

Because these rockers accept 1/2" studs, they offer a notable increase in stiffness compared to standard stud mount rockers. This makes them a great choice for anyone aiming for the ultimate in valve train stability, whether for track use or street performance. COMP Cams recommends using these with their Hi-Tech 1/2" Rocker Stud Kit for optimal performance and stability.