As far as im aware ;
Anything you do does not affect the warrantee as a whole.
HOWEVER
should a
problem occur that could relate to a modification you have done, then yes the warantee on that PART is invalid.
e.g you redo your ICE, and a speaker blows, then it isnt covered.
if the exhaust could effect that part of the car, and it goes, then its probably not covered, however if your windows stop working, then you are fine.
hope that helps
