Exactly right. The stock 17X8 will not fit. I just got a set of these myself and am gonna have to sell off the stock Cobra Calipers. I tried a test fit on the factory 94 Cobra wheels today, and that was a no go.(Curious, this question has come up a lot) I have the FRPP 17X9 Cobra Rs actaully on the car, little tight, but they fit with no issue.