Originally Posted by LilFord4x4
So in other words if I were to put an exhaust system on they would have no right voiding my power train warranty? It's been one of the reasons I've been worried about putting one on. The dealer I got the truck from said if I put any aftermarket products on that replace the stock ones that the warranty is void?
The Magnuson Moss Warranty Act is designed to keep the manufacturer from voiding your warranty for aftermarket parts, but that doesn't mean every dealership feels the same way about non-OEM parts. It's also not a magic wand that automatically means you will get your vehicle fixed for free. It still comes down to the individual Service Manager at the dealership. That's why I stress having a good relationship with your local Ford Service Manager and techs.
The Mag-Moss Act was really pushed by the after-market folks to make sure that their products wouldn't be boycotted by customers afraid of voiding the warranty. The Act is really designed to keep the manufacturers (like Ford) from voiding the entire warranty based on a single unrelated non-OEM mod. In other words, they can't void the powertrain warrenty if you put on KC highlights. Can they void it if you get a Bama chip; yes they can, says so right in the manual. That's why most people wait till after the warrany to do major mods.
That being said, it's still your vehicle and your choice. If your dealer has a hard stance on mods, then maybe you should look for another service place. Or, you could wait till the factory warranty is up. Just don't assume that knowing about the Mag-Moss Act will make them more compliant. Often, it's a last effort (like the Lemon Law), when you've had no success getting a large warranty repair fixed.