Best way to determine spacer size for your application, is to measure your car. I think it was Car Craft magazine that had an article in a recent issue that was a very good guide for determining wheel fit on your own vehicle.

One source for adapters is here:

http://www.wheeladapter.com/home.asp

Eibach, H&R, and at least a few other companies offer them as well.


cheers
Ed N.