Keep in mind all Dodge dealers are not the same and they definitely do not have the same attitudes. I purchased my last two from a small town dealer who absolutely loves working on the modified trucks. He needs the business on the show room floor and in the service house. I have talked to him several times and he is not about to deny warranty coverage on mine or any other truck for having aftermarket performance parts on it. Your dealer is your first line of defense... get to know him and what his policies are. I have had several warranty items fixed on my last truck and this one. When I traded the 01 H. O. in I was offered two trade in prices, one with the mods and one without. I took the one with the mods... and they sold the truck the next day... . CJ