So I installed my Stillen Z-Tube yesterday, and I noticed that when I punch it there's a whistle coming from my engine bay. It doesn't happen when you slowly raise the rpms, but if you tap the gas quickly it whistles. I tried checking the z tube, everything was tight and no apparent leaks. As I listened closer I noticed it was coming from the left side of the engine bay, couldn't really point out where its coming from. Normal? or should I be worried/concerned.

Edit: forgot to mention that it's not a constant whistle, only when I give it gas.

 

Im pretty sure thats the air goin in the intake and is normal

 

It is perfectly normal. My Stillen CAI with Z-Tube does the same thing.

 

Yep, normal.

Does with with my Z tube and OEM airbox.

 

Sweet, thanx guys

Now I can just pretend it's a turbo

 

What type of filter did you use? Stillen or k/n or pop charger injen filter? Just curious

 

There ya go!

 

I'll just add that it's normal... lol... I have the Stillen short ram as well but I opted to use the OEM z-tube instead of the stillen one, and it makes the whistle noise when giving it gas... It doesn't do it through the whole RPM range, just for a short period...

I have the Stillen z-tube for sale if anyone is interested...

 

Just ordered a stillen tube so we'll see how bad it whistles. My old stillen intake used to whistle like crazy

 

All of the aftermarket intakes I have owned whistled...