im not worried about the price, and i do not want cod. i would just like opinions on which is louder and which adds more hp?

 

best intake is ztube with rev up airbox and drop in K&N..no heat soak there

 

Your not really going to see huge hp differences between intakes. I'd go with what mkvl127 suggested. If you want more sound I've heard (not the intake, but from owners of them) that the nismo is pretty loud. Can't comment on the Ingen/Fujita etc. but maybe someone who has one can comment.

 

The stock intake is pretty efficient so you wont really notice any gains. Ive only heard my stock intake and z-tube/k&N drop-in so I cant really comment on how loud other intakes are.
I would think an intake with an open filter (pop charger) and a smooth intake tube (vs the chambered stock intake tube) would probably be the loudest.