computer chips/programs

[JoshC]

I've not been looking yet, but i am in the market for one to help regain my MPG and low end power. I lost my low end with a flowmaster muffler and a 3" tail pipe. Mileage is about 2 MPG less then stock. So, what do you have and how do you like it? Has it help with fuel mileage and what about shift point changes?

 

[AvroAero]

I have a superchips programer for my 99 4.6L and I've seen no difference. Shift pressure and rev limiter is all I've noticed.