Will a modified exhaust void factory warranty?

[Dakota_imp]

My wife is a service administrator and, as part of her job, submits warranty claims. If a customer modifies an engine outside of factory specs (an example is a chip to enable higher rpm operation for more horsepower), the warranty will be voided. The do not have to prove that the modifications caused the or any failure, the modifications are solely sufficient. Further, if a customer brings in a vehicle for service not related to the modifications and modifications are found, the modifications are removed and the warranty is voided. It is that simple and mirrors what I read on the internet in automotive forums.