I have the stock turbo on my 97 Cummins and wanting to get better boost and better mpg's. should I just upgrade my turbo or add on another turbo on top of my stock hx35? If so, what turbo should I go for?

 

you should probly put this in the performance section to get a better response. or maybe try the search button. But it sounds like you just want a good tow rig so I would look into a better single turbo, just think of all the space a twin setup takes but Im no turbo expert. and if your adding more boost head studs are a good idea