I've been looking on here 4 a couple of weeks now and this is my first post. U guys seem cool, so I need to present a problem. I put a CAI on my 06 forenza(which i love to death) and my butt-dyno read slightly better performance. A couple of weeks later I went on with a 2.5'' in-4'' out muffler from mufflermall.com. Well, the muffler sounds deep and great but i feel like I'm losing power now. Any answers??