if you put Lts on ur car and its lowered.. ur almost guaranteed to scrape on things.. Have u tried adjusting ur X pipe? and really tucking it up under the car? once youve driven it a while and everything breaks in, re adjust it.. doing it over and over ive gotten my full slp exhaust(minus LT) to sit quite well against the bottom of my car.. its actually now that i think about it really well tucked up there compared to before.