I was running 285/35-18 on streets and 275/35-18s on slicks at the track and along with being lowered, I scraped the underside of my stillen bumper enough to grind down the bolts that hold the undertray on and ruined the bumper.
Now I run 295/40-18 slicks and back to 19s for the street.
Yesterday, I noticed that I was also bottoming out in the back of the car too