COMP Cams Rocker Arms GM LS3 1.8 3/8 Ultra

If you're working on a GM LS engine, specifically an LS3 with rectangle port heads, these Ultra Pro Magnum rocker arms from COMP Cams are a solid option for improving your valvetrain. They're designed to increase the rocker arm ratio to 1.8:1 and offer greater stiffness than stock components. This means you can achieve improved valve lift without needing to change your camshaft, which can simplify your build and save you time. These fit a wide range of popular GM vehicles, including models like the Chevrolet Camaro, Cadillac CTS, and GMC Sierra 1500.

These rocker arms are constructed from 8650 chromemoly steel and finished with a black oxide coating. This material choice means they are built to handle significant stress, capable of withstanding up to 850 lbs of spring pressure, making them suitable for more aggressive engine builds. The set includes poly locks for secure adjustment and requires 3/8" studs and guide plates, with a 5/16" pushrod diameter. They are a stud-mount design, which is common for many LS applications.

This set includes 16 rocker arms, enough for a complete V8 engine. When installing, remember to check your existing valvetrain components to ensure compatibility with the 3/8" stud requirement and the 5/16" pushrod diameter. Proper setup is key to getting the most out of these well-made rockers and ensuring the longevity of your engine.