just drive as fast as you can over speed bumps. hopefully that will take the body kit off
i think it needs bigger wheels dude
try -110mm!
unfortunately no matter how fast you hit the speed bumps you wont manage to scrape the paint off - try going round a tight corner far too fast - you'll take most of the bodykit and paint off in one sweep possibly the lights too
Seriously though - the problem isn't the cars height, its the kit thats too low, making it higher would look stupid (more) so you're best either dealing with it, or taking the kit off