Engine Rocker Arm Spacer, Rocker Arm Pedestal Shim Kit, Rocker Arm Pedestal Shim Kit; 0.875 in. ID; Mopar 273-440 CID; 16 ea. (0.060/0.030/0.015 in.) Thicknesses; 48 Piece Set., 0.060/0.030/0.015 in. Thicknesses, 48 Piece Set, PRW Rocker Arm Shim, Rocker Arm Shim.