I have a 01' 1500 Silverado and would like to get some more horsepower out of my 5.3L engine. I have put on a K&N air intake and dual exhaust with Flowmaster, and that helped some but short of putting on a supercharger, what else make the Best improvements????
How well does a chip or computer programmer work??
Anyone have any hands-on experience as to how well they work?
Thanks