as christmas nears i'm trying to decide what i should ask for. so far things i have thought of are 4.56's, torque converter, 206 cams, or true duals. since they are all relatively the same price, the one exception being the cam, what would give me the best performance gains? my friend got a huge gain in performance in his truck going from stock exhaust to true duals. i'm wondering if a true dual set up would give me considerably more power than my si/so setup i have now.