I have run my 2006 with the EZ now for several months and pulled with it a lot. I had TST on my 2004.5 for about 20k miles and liked it a lot. Ran it mostly on 3/3 or 4/4.

The TST made my exhaust rather wet and sootly all down the side of my RV.

The EZ is very dry and clean running. After running them both I like the EZ much better.

 

Can't you run them both stacked? Maybe get the best of both worlds?

I see guys on here all the time running TST/EZ stack.

 

I get enough power out of the EZ for what I am doing. I wanted just 60-75 hp more out of this new truck. The EZ is easy to remove if I have to. The TST is complicated.