Here is what they do to the rods. This a old rod they brought to leave for Jim. Notice the .010 notch top and bottom. They do this on both sides of the rod. They say it increases oil flow through the bearing. They ask me how high my oil pressure gauage went---I told them my digi-panel gauge went to 50 PSI--they said I might have to change it---they run 80 PSI. Please dont blow all of this off until we find out if it all works at a good price.