What is the benefit of the 1.6 ratio on these rocker arms?

The 1.6 ratio on these rocker arms helps to increase valve lift compared to a stock ratio. This can lead to improved airflow into the cylinder and potentially enhance engine performance.

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

These Ultra Pro Magnum XD rocker arms 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.

What makes the billet pushrod seat insert important?

The unique machined billet pushrod seat insert offers exceptional durability. It provides a strong and stable contact point for the pushrod, helping to prevent wear and maintain proper valvetrain geometry under high loads.

COMP Cams Rocker Arms 1.6 Ratio 7/16in Stud Mount 1826-16

Name: COMP Cams Rockers CB 1.6 7/16in Ultra
Brand: COMP Cams
SKU: comp-cams-comp-cams-rockers-cb-1-6-7-16in-ultra-t14-4390865
Price: 676.42 USD
Availability: BackOrder

COMP Cams Rockers CB 1.6 7/16in Ultra

$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 with a 1.6 ratio and 7/16" stud mount. Built from durable 8650 steel for high spring pressure.

Key Features

Fits a wide range of Chevrolet Big Block engines, including 396-454ci displacements.
Constructed from durable 8650 steel for long service life.
Features a unique machined billet pushrod seat insert for exceptional durability.
Designed to handle up to 1,000 lbs of spring pressure.
Includes precision-sorted needle bearings and hardened roller tips to reduce wear.
Fully rebuildable design for extended use.

⚠️ 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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Product Details

Machined from tough 8650 steel, these Ultra Pro Magnum XD rocker arms feature a unique billet pushrod seat insert for added durability. They are built to handle up to 1,000 lbs of spring pressure, making them a solid choice for demanding engine builds. These stud-mount rockers are designed for Chevrolet Big Block engines, specifically the 396-454ci displacement, and use a 7/16" stud size. They fit a wide range of classic Chevrolet vehicles, including models like the Chevelle, Camaro, Corvette, and Impala from the mid-60s through the mid-70s.

The 1.6 ratio on these rockers helps to increase valve lift, potentially improving engine performance. COMP Cams has incorporated precision-sorted needle bearings and hardened roller tips to ensure smooth operation and better load distribution, which helps reduce wear and extend the service life of the components. These rockers are also fully rebuildable, offering a long-term solution for your engine's valvetrain. They are designed to work with most common spring and retainer diameters, simplifying installation into your existing setup.

The XD design benefits from advanced FEA and CAD analysis, optimizing strength and stiffness for endurance, drag racing, and circle track applications. This attention to detail in design and material selection means you're getting a well-built component that can withstand the rigors of performance driving. When rebuilding or upgrading your Big Block Chevy's valvetrain, these rockers offer a robust and reliable option.