What is the primary benefit of the 1.55 ratio on these rocker arms?

The 1.55 ratio means the valve will open and close more than the stock ratio for a given amount of rocker arm movement. This can help increase valve lift and duration, potentially improving engine breathing and performance.

What makes the Ultra Pro Magnum XD rocker arms more durable than other options?

They are machined from tough 8650 steel and feature a unique billet pushrod seat insert for added strength. The use of precision needle bearings and hardened roller tips also helps distribute load and reduce wear for a longer service life.

Are any special tools or hardware required for installation?

While these are stud-mount rockers, it's always best to consult the COMP Cams installation instructions for specific details. Proper setup may involve checking valve spring installed height and ensuring correct pushrod length for optimal performance.

COMP Cams Ultra Pro Magnum XD Rocker Arms 1808-12

Name: COMP Cams Rockers CS 1.55 7/16in Ultra Pro
Brand: COMP Cams
SKU: comp-cams-comp-cams-rockers-cs-1-55-7-16in-ultra-pro-t14-4390842
Price: 533.96 USD
Availability: BackOrder

COMP Cams Rockers CS 1.55 7/16in Ultra Pro

$533.96

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. Built from 8650 steel with a billet pushrod seat for exceptional durability.

Key Features

Fits a range of Chevrolet V6 engines, including models like the Caprice, Malibu, and Monte Carlo.
Features a 1.55 ratio for improved valve lift and duration.
Constructed from durable 8650 steel for long service life.
Includes a unique machined billet pushrod seat insert for exceptional durability.
Utilizes precision-sorted needle bearings and hardened roller tips to reduce wear.
Designed to 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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Product Details

If you're rebuilding the top end of your Chevrolet V6 engine, especially for endurance, drag, or circle track racing, a solid set of rocker arms is crucial. These Ultra Pro Magnum XD rocker arms from COMP Cams are designed to handle the demands of high-performance applications, offering improved strength and longevity over stock components. They feature a 1.55 ratio, which can help optimize valve lift and duration for better engine breathing.

These rockers are machined from durable 8650 steel, a material known for its toughness and resistance to wear. What sets them apart is the unique machined billet pushrod seat insert, adding exceptional durability right where the pushrod contacts the rocker. COMP Cams has also incorporated precision-sorted needle bearings and hardened roller tips. These components work together to better distribute the load and reduce friction, leading to a longer service life for the rocker arms and the valvetrain components they interact with. They are designed to work with most common spring and retainer diameters, making them adaptable to a variety of cylinder head setups. The XD design itself benefits from advanced FEA and CAD analysis, focusing on improving strength, stiffness, and optimizing mass for endurance applications.

This set is designed for Chevrolet 200-262 V6 engines that use a 7/16-inch stud. They are fully rebuildable, meaning you can service them if needed rather than replacing the entire unit. COMP Cams is a well-known name in performance engine parts, and this rocker arm set reflects their commitment to building well-built components for serious engine work. Remember to always refer to the manufacturer's installation instructions for proper setup and any specific hardware requirements.