Hi Jeff, the front wheels will definitively?fit and be a very good offset. The rears might be close. I used a similar-sized?18x8 ET 52 on my S4 with a 275 tire. The tire was about 1.5cm inside the fender lip. You might need to use one of those comparisons to see how much closer those 11" wheels will stick out. It could be a close fit depending on the tire?size.
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1992 Porsche?928 GTS Japan market
Michael Benno