If you're building a serious LS engine, the stock rocker arms just won't cut it. Michigan Motorsports LS3 Rocker Arms come fully assembled with a premium trunnion upgrade already installed — no guesswork, no hassle, just performance. Designed to eliminate the known failure points of factory needle-bearing rockers, this setup delivers the strength, stability, and confidence your engine needs when you're pushing the limits. Whether you're spinning your LS past 7,000 RPM, running a big cam, or cramming air into the cylinders with a turbo or blower, these rockers hold the line under extreme pressure. Compatible with a wide range of GM 6.0L and 6.2L platforms including L99, L76, L92, L96, LSA, LS9, LY6, and L77, this kit is ideal for street warriors, weekend racers, and full-on competition builds. With improved oil flow, extended durability, and a true bolt-on design, they're the no-brainer upgrade for anyone who demands real performance from their LS valvetrain.