The original shift knob was plastic coated rubber with a aluminum shift plate. Over the years, the plastic wears off and the shift plate dents and wears. So we machined this from solid 6061 billet aluminum, threaded per original, anodized, then laser engraved the sift pattern. This was for the 5-speed but the 4-speed could also be done. we did this for a member who wanted a custom replacement, if anyone else would like to have one please advise. If there is a group buy we would like to get the price down to no more than $50.00. If we can get enough people, we will have them manufactured.