I've got a 04.5 CTD 6 speed with the 3 stage edge, an afe intake and a dynoflow muffler. (It's straight thru) I'm wanting to mod just a little further. What are my options? Could I sell my three stage edge or is it married to my truck? Is there a big difference between it and the five stage? What is A TST? and please give me ballpark cost and gains from any suggestions. I don't have gauges yet and I know I need them.

You're running a box without gauges :badidea: I can get over 1300*F EGT stock!!

Get rid of the Edge there are tons more boxes out there edge on the 600 only puts out 65 hp. i am running a quadzilla 140 box stacked with a van aaken 135hp box and egts dont get close to 1400 and thats pre turbo. both boxes around 600 bucks together. excellent stack with excellent millage gains

If I'm not mistaking, 1300-1400 EGTs on these 600 CTD aint neccessarily bad? But, like mentioned earlier, You need to get gauges in your truck before any other fueling mods.