I've been checking around and i've stopped by both Diablo and bully dog's website and they are looking for 4.7L tuners to beta test. Diablo is looking for 05 and up owners. Currently they need a 06 4.7L to finish off the tuner. No one had posted yet that they had one so I left a message on their thread about my 4.7 but i doubt i get in because i live in MS. So if there is anyone here with a 4.7L that lives near Delray beach florida, you get a free predator and free tunes to try out. So HURRY HURRY!! Bully dog just has a request deal you have to fill out and really doesnt tell what specific vehicle they need. Just thought i would get the word out. Good luck.