the edge ez is a pressure box, just like the mp-8...the edge ez goes good with a smarty or the edge j/a...and yes the edge ez goes nice with a smarty tnt tune..
I've only used the TST one time. Its not even on the truck. I remember when I bought my Edge EZ 2 years ago and I felt the difference from the get go. This was when I just had stock turbo and stixs. It helped a lot overall power and MPG too.i dont know about that assasin, that seat in the pants feeling is HP.and really if anything is $hit its the TST..thats been responsible for a boatload of engine casualties.
I haven't tried the MP-8. But a buddy named J.P Libert had Smarty/ MP-8 and it ran great. Made 806 with 64/480 with Flux 4's and dual cp3's. Another buddy named Aaron made 868hp with 62/480 with Flux 3.4's and PPE Dual cp3 kit. Smarty/MP-8...........................................agreed lol. have you ever tried the mp-8 assasin