I've got an 02 chevy 2500hd 6.0 gas burner, that runs great and pulls great. But the fuel milage- - - - needs some help. I knew when i bought it it wasn't good but fuel was a whole lot less then, than it is now. I have a friends who have put them on both chevy and dodge diesels with great results (5-7 mpg and more power). If i could 1/2 - 2/3 that I would be super happy. My question is has anyone put one on there gas burners, and which ones did you use? What were the pros and cons, and were they what you expected? Thanks Tony