These are new mounting pads for the small block and big block Chevrolet. This is the side bolt style mount used on their 1947-1959 V8 engine conversion or 1963-1972 V8 engine conversion. Anyone with a high horsepower application needs these. We have also had these designed with an interlocking feature to still hold the engine in the case of a cushion failure. These are in black urethane. Sold individually. 2 pieces required per vehicle. For 1963-1972 trucks with original frame mounts that use the center bolt style mount. Use part# BBMM2UR.