Originally Posted by bowietrucking

stacks are gay! j/k.!!! i'd think you could hear the turbo with stacks as it shorter and its closer to where you sit. just sayen but i'm not a stack kind of guy. unless there 8" staight stacks on my big old peterbilt!

Originally Posted by crazycooter

ford put a puny a$$ wimpy turbo on these things... you want to make it sing a little more, put on a smaller exhaust housing. On the wife's truck, I went with a .84 A/R exhaust housing when I rebuilt it. You can definitely hear it inside the cab, almost sounds like a siren whens she is winding up and down.... not to mention I get about 28 psi max boost too