Rubbing will only occur with a wider wheel (8 inch) or the wrong offset. Your optimal wheel width should be 7.5" with a 42mm offset. If you run any more positive offset, you may rub. My car has 18x8's, it rubs in the back with H&R's and Koni's. I also ran the stock shocks with the H&R's, and it rubbed a little more. I think the myth behind Koni's is just because they can be stiffened up, so the suspension doesn't travel as quickly, therefore, not allowing it to rub as often. But it will rub with Koni's if you have the wrong width and/or offset.
