Used connecting rods to suit K75 series up to 8/88. These pistons and rods are sold as a set of 3 only from the same motor. The bolts holding the caps on the rods are there only to keep items together. It is recommended that the six (6) used bolts with nuts are replaced with new bolts and nuts as these are a once only use stretch bolts.
Going by the number on the bearing shells, these are standard bearings and the pistons look to be standard as well.