Warrenty
 

What upgrades can I get for a 02 P5 that will not void the warrenty??

:D

You can modify anything that you want. If a part fails under warranty, the dealership has to prove that the part failed because of the aftermarket part you installed. Worse case, return the car back to its stock form and take it into the dealer.

I had the same question, so I went to the dealership to ask. And just as stated above. Nothing will void your warranty unless it is proven to have malfunctioned as a result of a modification made. They told me it is fine to add an exhaust, intake, springs, struts, and rims. Those were all the mods I asked about.