I just got a 2003 WRX and I've decided to go the Exhaust/Intake path of upgrading. And I'm deciding between a Greddy EVOII exhaust pipe or a Greddy TI-C exhaust pipe. Any recommendations? And could anyone recommend a particular model air intake from Injen? I'm not really sure what to look for. Also, is there any basic site or thread that can explain simply about suspension and strut bars and etc.?