to add to this...
the time old question.."if i mod my car will i lose my warranty?"
if you mod your car and something happens... the dealership will look for the problem. if they find the fault and its not the mod that caused it, you will still be fixed under warranty. it also depends on the dealership... some are very mod friendly others not to so much.
also remember: "you gotta pay to play" so if you want to mod your car stop being soooo worried about something going wrong, alot of the times its something the modifications didnt do. i have a few engine mods, suspension, rims, etc; problems ive had, door panel needed replace covered, trunk latch broke covered, belt check covered, light inside fell out covered.... if it doesnt cause the problem you will be covered.
here is a legal read regarding the mods vs. warranty: click here
a thread about it on here before, click here
hope this helps!