@JBINTX grumble grumble I figured it out, sigh. I bought 5x110 which is based on the stock hubs that you have on your car. They clearly don't fit mine so I took a few measurements and dug into the documents that came with my car - I bought this one as a work in progress. In the specs for the donor it's mentioned "5x114.3 hubs". So weirdly I need a custom 1" thick spacer that is 5x114.3 to 5x4.5". I say "weirdly" because 114.3mm is....4.5" .
By the way, the new wheels - same spec as yours - arrived today as well and look fantastic. Slicks will be here in April. Must wrench....
