Just wondering if anyone has heard of or know anything about this. Under accel from 1500 and up, I hear a fluttering kind of sound that sounds like it is coming from pass side. My car runs great, no cel and the only mod is a K&N FIPK. Ive had the intake on for awhile(3 months), but I'm always jamming when driving and never really listened to my car with no stereo. Any ideas?? Thanks

 

I have Okole seat covers and the wind was blowing through the headrest helmet holes and making the seat cover flutter. Check on the passenger seatbelt by buckling it up to try to isolate any material that is hitting a harmonic.

 

You were accelerating from 1500 rpm?!?!?!?!?!?!?!

 

The noise is most likely caused by cavitation in the strap holding the tonneau cover on. A simple 360 twist before snapping it down will stop the noise.

 

Its almost seems like an exhaust leak flutter, or coming out of the intake???

 

I have a similar sound, It sounds like a flutter that increases with RPM and I think it sounds louder under the car than under the hood

 

Let me guess, it is easiest heard when you drive past a wall or another car, bushes, etc?

 

Got that here too. Trying to figure out if it's normal. Any feedback would be greatly appreciated.

Thanks in advance.