Will a modified exhaust void factory warranty?

[AzBob_imp]

Even if they had an idea or even knew they were responsible for a problem, they aren't always going to admit it. Manufacturers will stonewall you and tell YOU to prove your case. I've had warranty repairs denied. - Not by Honda but by Chrysler and Volvo- It's not easy to fight the manufacturers and they count on you getting discouraged and hope you give up.

Not saying it doesn't happen, and without first-hand knowledge of the case, can't really comment. Just saying that for the most part, the manufacturers honor their warranty. Sometimes the dealer can be the stumbling block because they think they know more than the home office and say that a repair won't be covered under warranty because they'll have to go through a little bit of work to prove to the home office that it is indeed warranted or they know the reimbursement rate on the repair from the manufacturer is low and they don't make a whole lot of money on it. Usually, unless it's really sketchy (i.e. the owner put a supercharger on the engine and is now claiming a warranty repair for blown rings), a simple letter from a lawyer will turn up the heat enough to grease the wheels (two metaphors in one sentence! Two points!).