I know this might seem like a silly question but do OE RS4 alloys fit onto a standard A4? I have seen lots of sets of these for sale on Ebay and all of them say that they will fit an A4. However I have read on various forums that they will only fit an RS4. So what is the truth, and if they dont fit why is this? Is it the PCD or the offset that is different? Surely if its just the offset they can be machined to fit?