So my old 1997 cobra was easy to get HP out of it with the basic bolt ons (intakes, exhaust, throttle bodies ect.), However these new fangled 08's are a different story. What should i focus on that allows me to do a little here and there as i go? without dropping thousands into S/C kit. 1.I am getting a CAI and Tuner. 2.thinking axel back exhaust (mainly for sound)? OR should/can i start piecing a full system starting at the exhaust, then cats/x pipe, then headers? OR is it better to do a full system all the way back all at once ( i don't want to be too loud with unwanted attention, and buget is a factor.) 3.What would be the next steps for HP gains? that are at a reasonable budget.