I've got a catted X pipe and I'm about to have H&R race springs and Bilsteins. Should be a great ride and less of an overall drop compared to Sports. Springs rates are much higher (F: 750-850, R: 260-280), but the Bilsteins are perfect for this situation. Not worried about ground clearance too much, plus I'm gonna have my installer check to see if the cats can be brought closer by a 1/2 inch or so. Overall, still leaves me with over 2" of ground cleanance.