Ketchmi

45mm offset fronts have been known to work just fine depending on tire selection. This 87' drove beautifully with no rubbing, tramlining or contact with 225/40-18 Conti DWS and a lip rolling. But to quote an old timer from this list...YMMV!

pluckedchicken

I only recently purchased my 928, came with 18s... previous owner told me he made customs hub covers to accomadate the concave wheels (he owns a machine shop) I haven't gone through the box o'stuff he gave me, but he said includes the orginal hubs, and a tool to remove the custom covers