What is the primary benefit of the 8650 steel construction?

The 8650 steel used in these rocker arms is chosen for its inherent strength and resistance to wear. This material helps ensure the rockers can withstand the rigors of engine operation and maintain their shape and function over a long service life, especially under high spring pressures.

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 practice to verify compatibility with your specific spring and retainer setup before installation.

What does the '1.5 ratio' mean for my engine?

The 1.5 ratio indicates that for every unit of movement at the pushrod, the valve will open 1.5 units. This ratio generally results in slightly more valve lift compared to a stock 1.0 ratio, which can contribute to improved engine breathing and performance.

COMP Cams Rocker Arms 1801-16 1.5 Ratio - Small Block Chevy

Name: COMP Cams Rockers CS 1.5 3/8in Ultra Pro
Brand: COMP Cams
Price: 665.60 USD
Availability: InStock

COMP Cams Rockers CS 1.5 3/8in 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, 3/8" stud, 8650 steel.

Key Features

Fits a wide range of Chevrolet and Buick vehicles with Small Block engines and 3/8" studs.
Features a 1.5 rocker arm ratio for improved valvetrain geometry.
Constructed from durable 8650 steel for long-lasting performance.
Includes a unique machined billet pushrod seat insert for added 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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Will this fit your vehicle?

Product Details

If you're building or rebuilding a Small Block Chevrolet engine, these COMP Cams Ultra Pro Magnum XD rocker arms are a solid choice for improved valvetrain durability. Designed for engines with 3/8-inch studs, this set features a 1.5 ratio, which is a popular choice for many performance applications. They are built from tough 8650 steel, a material known for its strength and resistance to wear, and are designed to handle spring pressures up to 1,000 lbs. This makes them well-suited for engines that see a lot of use, whether on the street, drag strip, or circle track.

What sets these rockers apart is the attention to detail in their construction. They incorporate a unique machined billet pushrod seat insert, adding exceptional durability right where it's needed most. The use of precision-sorted needle bearings and hardened roller tips helps to distribute loads effectively and reduce friction, which translates to a longer service life for the entire valvetrain. These rockers are also fully rebuildable, meaning you can service them if needed rather than replacing the entire set. They are designed to work with most common spring and retainer diameters, simplifying installation.

This set fits a wide range of Chevrolet and Buick vehicles from the 1950s through the 1990s, including popular models like the Chevrolet Camaro, Corvette, and Chevelle, as well as Buick Skylark and Regal. COMP Cams has utilized advanced FEA and CAD design to optimize their strength, stiffness, and inertia, ensuring they perform reliably under demanding conditions. If you're looking for a well-built, durable rocker arm set that can handle significant spring pressure and offer a long service life, these Ultra Pro Magnum XD rockers are a great option.