"With the KWs do you lose any inside clearance space, wheel to strut?"
It's pretty close. My stock wheels fitted with Falken FK452s (225/40R-18) don't rub, but I have not dropped the car all the way as some do. According to the KW literature, wheel spacers may be required at full drop. I can totally believe that. Front wheel below at -2.8 camber.
