Rocker Arms Trunion Kit Replacement Parts,These LS series retrofit trunion kits are designed to convert stock LS series rocker arms into captured roller bearing rocker arms. Engine Parts Rocker Arms Trunion Kit,The upgraded trunions use a captured roller bearing allowing for a reliable smooth rotation, and also give more stability at higher RPM. We use these trunion kits in anything, the kit includes the rocker arm trunions, rocker arm bearings, and rocker arm retaining rings and upgraded bolts for a complete installation. The bolts are slightly shorter than factory bolts so they do not protrude into the intake ports. Bolts are stronger than a grade 8 bolt with a minimum tensile strength of 170,000 psi. Installation is fairly simple with the use of a press or a simple vise along with basic hand tools.