Yes, to run some +38mm offset wheels without rubbing you have to grind down a small section about the 2:00 position on the drivers side rear wheel well.

 

I'm running et30 wheels with 225/50/R15 tires, and to make them fit I had to essentially cut most of the outer-most-portion of the fender-well-liner away in the rear (the front is fine).

It was pretty easy to do (though a bit scary), I also had to mush in a couple of protrusions near the rear-most portion of the fender wells (its a bit that sticks out around a screw mounting hole. I did this by removing the fender liner, and heating up the plastic with a blow torch, and then pressing down on it firmly with some heavy-leather-gloves on. This worked great, as the plastic gets soft very quickly with a torch...

All in all it was pretty easy, and now my car looks AND drives awesome!

RM2k5