Met Jerry..the owner of SDC yesterday,and took a tour of his shop,as well as picked up a set of his VERY NICE cap sets! These are the same caps that Greg,from BCR,was manufacturing and selling...with an EXCELLENT track record on their fitment..and over-all quality! These caps are 100% machined from AMERICAN-produced materials..which is good to know! They have some very nice features..which I can show you on some pics I took of them! Thank You Jerry..for the tour..and the caps! Randy B.