Motor Mount; Adapter Plate, Steel, LS-1; One Pair With Hardware• Solid Transmission Mounts must be used in conjunction with Solid Motor Mounts to prevent breakage of engine block and transmission case due to torsional stress • Simple and efficient way to adapt motor mounts to fit LS Series Engines • Manufactured from 6061-T6 Aluminum • Black anodized finish resists corrosion • Works with G.M. Factory 3-Bolt Mounts and Moroso Solid Motor Mounts Nos. 62500, 62510, 62515, 62530 & most aftermarket polyurethane mounts