Hello all, I made a shift knob adapter for my car that allows me to screw on any shift knob I want. I get tired of the same knob and I thought the stock knob looked like something out of a Honda or something! This adapter just slipes over the stock shaft and is held on with two set screws, then the shift knob screws on (m16 X 1.5 threads) and then the hex nut screws up from the bottom to retain the shift ball in whatever orientation you want.