COMP Cams Rocker Arms GM LS3 1.8 3/8 Ultra

When you're rebuilding the top end of your GM LS3 engine, you want parts that can handle the stress and help you get the most out of your setup. This set includes eight Ultra Pro Magnum roller rocker arms from COMP Cams, designed specifically for LS3/L99/L76 style heads with 3/8" studs. These aren't just any rocker arms; they feature a 1.8 ratio, which means they'll increase valve lift compared to stock, helping your engine breathe better and make more power.

What sets these apart is their construction. They're made from investment cast 8650 chromemoly steel with an arched, web-like design. This approach makes them strong and rigid, but also helps reduce rotational weight for better performance. You'll also find oversized trunnions, precision-sorted needle bearings, and hardened roller tips, all contributing to smooth operation and long-term dependability. Plus, the black oxide finish helps resist corrosion, and COMP Cams backs them with a lifetime warranty against breakage for the rocker bodies, provided you stay within 850 lbs of open spring pressure.

COMP Cams also paid attention to clearance. The retainer and valve spring clearances are optimized, so you can use most common spring diameters, retainers, and +.050" locks without running into fitment issues. This makes them a solid option for a wide range of LS engine builds.