Qr25 Nissan noob - advice = great

[Dubbs_08sPeCv]

Hey guys, I'm new to the forums, seemed like one of the best forums to join, so I followed through with just that. I bought a 2008 spec v sentra, mods include an INJEN CAI, an that's about it. I hate to did up old news but I searched on here an was finding old posts from like pre-2010 about modifications to free up some ponies in the spec v. There wasn't much that was said, by now, 2013 I'm sure there should be even more info an experiences with these cars, that some of you guys could shed the light on me. I'm in the process of an exhaust, that's a given, I know the cars OEM is pretty restrictive. But besides an exhaust, what could I do to the car to achieve some more power without the use of N20, or forced induction? Forced Induction is in the plans, but not at the moment. Any help would be greatly appreciated, an once again sorry to bring up old news. Thanks!