Is this good? I called a guy and he fired up his STI for me which had this exhaust, and it sounded sweet. Well my questions are is it good hp wise? It is 3 inch full cat back, is that big enough? Or should i just save up and go with Vishnu stage 1 pack? Thankyou, i am just trying to figure out what mods that i want to do to my car to get some more power, all input is appreciated.