[freddddddy]

CAI would be better, but any kind of gains with these cars is better than none. SRI would give you something but don't think it would be enough to notice. I hear it does give a nice deep tone to the engine though =)

The CAI does give a little more but neither is really noticeable, in the long run CAI is better but you also have to watch if you're in low water level areas because there is risk of engine soak. I prefer SRI, I know it's like 2-3 less hp but I'm happy

And the Versa is not a fast car. The only real modd to add lots of HP would be turbo (nobody really knows yet), supercharger (on its way for the past year now), and engine swap. For now I'd suggest doing suspension mods. Those are my .02

 

[freddddddy]

It will sound great and trick you into thinking you're faster than you really are.

Lol it def does for me plenty of times..

 

[freddddddy]

Yeah you will be! But It's a little sad when it hits around 6000 RPM. You'd want it to get louder but it fades. Oh well! :shrug:

 

[freddddddy]

I wish I could remember where I got mine, but it ended up being like 180ish shipped. Lowest I could find all over the web.

Just look at different sites and compare