I've had my MD 5/16th plenum in for about 5 months and ever since I been driving my G I hear a slight whistle at 3k rpms. I only hear it at 3k and not higher or lower than that. I have a 04 5AT with stillen cold air box and z-tube. Is the sound coming from the intake? My car has been running fine with no CEL and idles around 650 so I am not suspecting a leak from the plenum. Any thoughts would be appreciated. Thanks.

 

Yes it is prolly your intake. You can hear your intake sucking up that air.

I have a stillen intake with z-tube and it does the same thing

 

I have a 100% STOCK engine bay and I can hear the whistle hiss :l

 

Definitely intake

 

That's those big azz boats going to and from Seattle you're hearing not your Infiniti G35....
Gary

 

You can't bowrofl your own joke! Especially if it was as bland as that one >:l

But seriously, I can hear it.

 

^^dont worry i have a 5AT 100% stock and i can hear it hiss also =]

 

"don't worry" or more like... "LET'S BOTH WORRY" ?!?!?!?!

Kidding xd I've been hearing it for three years so yeah, ain't trippin'. Yes, stock motor for three years.

 

nope lol im definitely not worried..just your intake sucking in air..ive had mine for a year and its always done it..well while its in Manual mode..obviously in AT mode it doesnt reach high enough RPM to hear the hiss..

 

Lol? It shifts at 6.5k RPM's if you floor it...

 

yeah but if i do that im on the interstate with the windows up and the radio on so cant hear the hiss then..lol

i dont floor the car too often..i take care of her..lol and with how low i am and not being able to predict the future of whats on the road ahead i dont speed often either.

 

I'm 100 percent stock and I have this exact same sound. I don't think its anything to worry about. I just pretend its a turbo spooling

 

 

How does that even

 

That's a sweet reverse plank!