lower mounts recently got replaced with solid rubber ones a couple of months ago, the only things I could imagine would be hitting are the tranny dipstick or the front o2, both of which I tried to address when putting them in like you're supposed to (bent the dipstick a bit, hammered some room for the o2) but maybe I'll have to go back and try to make some more clearance. not really sure how to test to see if they're hitting other than just trying to rock the engine?