Hi guys,

finally installed my Ztube yesterday, question is, I've seen quite a few installs and why does my Ztube have the extra piece that hooks to the plenum on top? (circled in red)

The A/C vacuum line was underneath which was a bit tricky but I managed to fit it back on the intake pipe.

2nd pic is my factory V tube

Did a bit of a squirt around the neighbourhood after install and definately sounds a lot better around the 3-4K rpm!

Can't wait for the HKS muffler.

 

Just installed mine on my 06 coupe from an 06 Z just this weekend. It did not have the extra piping line. Not sure what that is.
Definitely sounds better than the stock setup.

 

i dont recall having that part...but i do love the sound

 

wait till u get a stillen intake 2 go with it talk about a monster sound.

 

guessing this is not US spec G35 since the master cylinder is on the left. i would guess the tube is an emissions difference.

 

Its a JDM V35 and the Z tube is out of an AUS Spec 350z. Do your factory G tubes have that cannister hooked to the bottom?

 

Correct. The G tube has the resonator chamber on the bottom. The Z tube does not, hence the slight increase in sound. However, both the Z and G have the breather tube underneath.

 

So would it be safe to assume that piece of plastic on the Z tube is the resonator chamber for the Z? Weird how USDM models don't have it...its a pain coz now I can't screw in that last screw on the top right hand corner of the engine cover.

 

I would only assume that if the chamber it goes to is closed. If it feeds into the plenum or anywhere else then it is acting as a breather. I cannot tell by the picture if it actually leads into something or it just stops near the throttle body.