So recently I have noticed that under moderate acceleration there is a hissing like sound coming from the engine and or exhaust. The best way to describe this is almost like a tamed BOV purge or an exhaust leak. But this is only heard between about 3500-4500 rpm. Anymore or less and it is not present. Could this just be normal and is the sound of the exhaust at that rpm range?

 

Te hissing sounds comes from when you let go of the pedal right?
Thats normal bro. Thats just the car is.
You have nothing to worry about.

 

yup ^
and when shifting around that RPM too

 

yup it is normal..
you should be happy about that BOV sound

 

I took the car to the dealer a year ago to address this (what I thought was a problem) and was told it was normal stock sound.

 

Yeah I have that, and it's really loud with HFCs, sounds like it's coming from the flex joint. I'm guessing it's where the noise can escape from. It's just at a specific rpm.

 

Well i guess that is good to know that this is normal and i am not the only oine to have experienced this. Although it is not when i lift off the pedal as it is an auto and only occurs on the 1st to 2nd upshift.

 

Especially in D.
I love the hissing sound.
Sounds sick when you have an exhaust.

 

i have just installed headers, Res Test pipes, and y-pipe on the stock muffler and i get that hissing now also. i am 6MT so right around 3000rpm or when shifting it gives me a pssssshhh. i thought there was a leak from the test pipe flange or in vaccum lines but i guess now reading this thread it is normal. mine is really loud.

 

with HFC's and larger piping on the Y-pipe it really makes the sound louder.

 

Wait it sounds liek this right?

 

It's the resonators in the exhaust. I don't notice it as much after 13K miles, was louder when the car was new.

 

^ I cut out the resonators still there, I replaced it with an x pipe thats resonated it's still there.

 

yes but mine is a lot louder.
even louder than this...

 

Dude mine is just like that video you posted, But oh god his exhaust sounds good, Lol.