anyway my g35x can obtain hp from either a ztube or stillen air box? or just go with a dropin k &n air filter? basiclly lookin for a way to gain hp through airflow although the stock intake is great

 

Uh oh, watch out my friend. Ill be nice and tell you to use the "search" function...

 

Everyone has their opinion on intakes.

Z-tubes makes more noise, the Stillen air box is still open to hot engine air.

If it was my money, I'd just get an Amsoil filter + Z-tube (gotta love a little growl) and call it a day. I also have a revup airbox, but it's debatable if that does anything.