COMP Cams Rockers CS 1.6 3/8in Ultra Pro

If you're working on a Chevrolet Small Block engine, like those found in a classic Camaro, Chevelle, or Corvette, these COMP Cams Ultra Pro Magnum XD rocker arms are a solid choice for rebuilding or upgrading your valvetrain. They feature a 1.6 ratio, which means the valve will open further than with a stock 1:1 ratio rocker, potentially improving airflow and performance. These are designed to work with 3/8 inch studs, common on 265 to 400 cubic inch Small Block Chevy engines.

These rockers are built from durable 8650 steel, a strong material that's known to hold up well under the stress of engine operation. They also include a unique machined billet pushrod seat insert, adding another layer of durability right where the pushrod contacts the rocker. COMP Cams designed these to be fully rebuildable, and they use precision-sorted needle bearings along with hardened roller tips. This setup helps distribute the load more evenly and reduces friction and wear, leading to a longer service life for the rocker arms and the rest of your valvetrain components. They are engineered to work with most common spring and retainer diameters, making installation more straightforward.

The XD design incorporates advanced computer-aided design and finite element analysis to optimize strength and stiffness, making them well-suited for demanding applications like endurance racing or circle track. They can handle spring pressures up to 1,000 lbs, which is a notable amount and means they'll work with a wide range of performance camshafts and valve springs. When installing, remember to check your pushrod length to ensure proper geometry with the new 1.6 ratio rockers.