This set of four intake valve springs have been made to the original prints and specifications. The following Overland models use four of these springs: Model# 37, 38, 40, 41, 42, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 58-R, 59-T, 59-C, 59-EX, 59-O, 60-T, 60-F and 69. They are Willy-Overland Part Number 2471.