P8 Motor HW Kit, First Stage 4:1, CIM Motor P8 Motor HW Kit to mount an unmodified FIRST CIM motor with an 8mm shaft and a 2mm key to a P8 gearbox with a first stage of 4:1.This kit contains a pinion, spacer and screws. This kit does not contain a motor input block. MSRP: Was: Now: $7.50 Add to Cart