I have been told a few different things already so I wanted to get someone else's input on this. Roush claims they will only give you the 3/36 warranty with use of their tune which makes sense. JDM Engineering claims that after they tune it Roush will still warranty their work. I'm a little unsure about this but I just read an article where Jim put down 510whp which is looking very nice. Then again my only reason for going with the Roushcharger is the warranty. Any info is greatly appreciated.