Will a modified exhaust void factory warranty?

[Dakota_imp]

The manufacturer needs to prove that your modification (or neglect of required, documented maintenance) was the direct cause for the failure and not a defect in design or manufacture to deny a warranty claim in the U.S.

A manufacturer or dealer is not going hire outside consultants to do an in depth study to determine the cause and provide you with a written report. The real issue is that if you disagree with the outcome, it is upon you to take the dealer to court with your own $proof$ to force a claim to be covered. MANY of the automakers deny warranty claims with no "proof."