I havent installed one on a dodge. The chevy only lasted one day. The ford , Chevy , and the Dodge all are different. Some expire by keystarts, some by how hard you drive, and some by just time. I dont know which one is which though. You WILL NOTICE a difference if you have crazy larry in there. I had Crazy Larry in mine and then went to the triple dog and noticed a big drop in power. The demo probably wont last 3 days based on what I have been told.