There are several free mods you can do, go to www.thedieselstop.com, select forums on the left to find them, a manual boost controller is not possible since the powerstroke turbos are n0t even wastegated. The simple mods include raising the fuel pressure in the regulator, getting rid of the electronic backpressure butterfly valve, larger downpipe and some form of a tuner, that is what I had on my 97, ran pretty good. Make sure you put in a bigger downpipe before you start fuckin around with tuners.