I have a set of 15mm H&R Direct Stud Replacement spacers...
I purchased them to replace my 10mm DSR H&R's on the rear on my Z for my Volks but they were too much.. I ended up using my 10mm plus a 2mm cheapo spacer... All I did was put 1 of the 2 15mm spacers over my pre-installed studs for a test fit and a days worth of driving... the other spacer and the lugs were not touched at all... They are basically brand new..
$105 shipped...
so again 1 of the 2 spacers hasnt been mounted, and the studs are still in the bag untouched....
LMK if you are interested... Thanks!