the products that will not void any factory warranty is an intake and exhaust. any other products will not be covered for instance shocks if a aftermarket shock goes out and ruins the ball joint acura will not cover the ball joint or anything else. because the damage was caused by a non factory part. also depending on what dealership you go to they may what you call goodwill the damage and fix it all just to keep you happy and coming back.
there are alot of perspectives to this question all depends on the dealer.