InMyRearView

The only issue im aware of is with long tube headers. I dont think they're emissions legal and thus Ford can make the argument that the vehicle had offroad exhaust and therefore the vehicle was used for offroad purposes. VOIDED WARRANTY. You can change the intermediate pipe without voiding the warranty provided they have cats. The dealership may try to void a warranty for external mods, but the law is on the consumers side. You have to be knowledgeable of these laws. The dealership doesnt just voluntarily inform you of them.