I am a new 2008g35xS owner and I've been doing some reading on some inexpensive mods to add some performance and a little sound. From what I've read on hear it looks like going with a z-tube (either from a 350z or stillen makes one), a K&N drop in, and a plenum spacer is a good place to start. Possibly an exhaust system and a tune down the road. My question is how much hp gain should i expect from the ztube, K&N and spacers? And is there anything else anyone reccomends? Thanks is advance.

 

get the r2cs!