Just had my NISMO exhaust installed today at Nissan dealership.
I get in my car tonight to go for a test drive, and now I have a high pitched buzzing in the rear.

The sound is like the kind of buzz you hear when you are having your hearing tested. The sound is continous, and the volume does not change at all. Whether I am driving or in park, at all rpm's, the buzzing is still the same.

It appears it is a little more audible on the rear drivers side.


Anyone with some ideas about this noise?

 

if you installed it at a nissan dealership... then no need to waste time... go streight there... problem solved.

 

I could be a leak of some kind.
Leaks are easy to fix.