So I still have a whistling noise under my hood under higher RPMs after I reseated all the air intake stuff. It only happens around 3500 RPMs and but normal driving you never really hear it unless I hit the gas harder and it gets up into the higher RPM range. So what do you all think it is? Usually when it starts to whistle it starts to make more power it seems like so maybe its just more air getting sucked in cause im in my power band? I have been told it could be a vaccuum leak but I havent had any problems with anything.

Right now the intake is stock and I have a K&N drop in filter on it. I had a OEM nissan filter on it and it was still making the noise...

 

it's normal, my scion tc did the same thing lol, my friend actually thought i had a turbo under my hood,. when i bought the car brand new, i wonder why he didn't listen for my bov lol. is your car 6spd?

 

its normal youll always have it nothing u can do about it

 

i have it too and i love it, it sounds real niice.

 

yea its a great sound people always think i have turbo

 

thats norma, thats the air being sucked in

 

probably a vacuum leak...

 

thats always good...until you get someone who wants to race you lol

 

yepp i have it also i acually tell me friends to STFU so i can listen to it

 

There was another thread on this before, something about it being the gas pump or air pump or something pump..hope that helps

 

mine did that too i love it!!! hahhahah

 

that whistling sounds gets much louder when installing the MREV/5/16.
Now I hear it down low and up top.

At 1 point I thought my K/N was going to get sucked through the
intake

 

damn i dont have it !!! wish i did

 

i've got it. at first i found it super annoying. still don't like it, but i learned to live with it.