i currently have an 02 GT 5 speed..only mod being an MGW shifter. i'm looking at getting full bassani exhaust..the catback, offroad x pipe, and headers. how much power can i look to gain? also..is the SS stuff really that much better than the bx? now..the built rear question..i'm looking to get 31 spline axles and differential..who makes good cost effective stuff? i plan on getting a vortech s-trim this summer and running 11s on drag radials. thanks.