Not sure about a 4" height increase lol... even the HD springs are nowhere close to that. I got just about 2" more on each side with the HD springs. My old struts were completely blown though, so if your front isn't sagging you'll get a little less. The ride with KYB struts is amazing. It's not too harsh at all, but it's much more firm and truck-like. I fit 265/75r16 even before I had the OME springs, so you should have no problem.