Oh Im sure it will, I took the EZ off my dads 03 SO, not the 600 EZ. Ive ran this box before when my truck was brand new and it does make power just not correctly. This is why I only ran it on lvl 3, because 4 is to much pressure. I posted it a while back and everyone said that its to much fuel and that the EZ doesnt work with the 600's yet. Well I may be young but I wasnt born yesterday, Even with the EZ on 3 and the TST on 1/1 or 2/2 it should of felt stronger than with the TST alone because it rips on 5/5. Also I know that the EZ does make power for the 600's because I ran it before anyone else on this board and it made my truck move pretty good lvl 4 it did throw a CEL with the code "fuel delivery error", it didnt hurt the truck because I just did about a mile road trip and 2 or 3 runs to see what it would do, but I ran it on lvl 3 and no problems.