I have a K&N filter, MIT, Corsa cat back, and the Hypertech. The Hypertech part # is 50014. The Ram truck part # is different as is the one for the Magnum's/300's. I have not had it on the dyno, but the Hypertech premium tune made a noticable difference and with the mods noted above I get 19.8 MPG driving to and from work (70% highway/30% local). I have an 06 LTD with the Hemi....

 

Yeah I heard that about the throttle body spacers. Thanks for the part number on the hypertech.