DYNO's, Horsepower, torque......... Eah! Whatever! Let's talk drivers. Ford should of had a class when you buy your mustang, they teach you how to drive it. That way no dumb ass gets beat my rice a roni, giving us a bad name. Well a least having to defend it. Someone with a bone stock 5 spd notch can bust into the low 13's while some can't seem to get their modded one into the 13's.
i done have any dyno numbers but exhuast is a good way to get some proven HP, and better sound. Pulleys are also proven, will add (or free up) horse on ANY car. then of course the SC....