To give you an idea what it takes to get decent power out of these engines when N/A, here's a stroked HR motor thats fully built and most likely has custom parts. This was using a hub dyno somewhere up in Canada: http://my350z.com/forum/vq35hr/58476...ng-400whp.html

 

What no one has mentioned to you yet is that these cars aren't using Honda engines that respond well to bolt ons, or LSx's that just need a cam swap and opened up exhaust to see huge gains.

They're actually pretty well engineered from the factory in that there's no single choke point you can address to magically open up sick gains. Matter of fact you've probably lost power with your Injen intake (or certainly will during the summer if you haven't already). Do some research, stop throwing money at the car until you know what the end goal you want is going to be, and how to get there.

Replacing / removing the OEM cats with a non-OEM cat is a good idea regardless, if you're not in California and can get away with it.

Welcome to the forums, stop asking questions for a couple days until you have the background info that will prevent sarcastic / stupid responses.