RE: What would void the new Challenger Warranty?
I work for a major manufacturer and our warranties work as it states in the statement as per above. Aftermarket parts are ok, however if they cause the failure of a covered component, the warranty on that part is void. We dont warrant aftermarket parts unless they are made by us and sold and installed at our dealer.
Just to be sure, be cautious. IF you modify your car, be prepared for some resistance on warranty claims despite the above policy. There are many grey areas and it often depends on the dealers opinion/diagnosis.
So basically, if you put a supercharger on your engine and it leans out and melts the internals, not covered.
If you put louder mufflers on your new Challenger and the alternator fails, covered.