Weird Exhaust noise

[brandon97GT]

I just had a full flowmaster cat-back installed, and I noticed when I stand behind the car, the right pipe is making a crazy noise. It kind of sounds like the same sound my top makes when I raise/lower it. It is just a faint "whine" sound. Has any one else ever notice this on their cars? Should I take the car back and let the guys that did my exhaust look at it, or is this just common?
Thanks,
Brandon

 

[DarkShadowGT]

a leak? does it do it in a rhythm of some sort?

 

[brandon97GT]

Yeah, come to think of it, it is kind of a rhythmic sound. That is why I said that it reminded me of the sound my top makes when I lower it. It is kind of high pitched and goes my cars' idle. Why would I have a leak on a brand new system though?

 

[DarkShadowGT]

maybe when they installed it they forgot to tighten something down...go down there and chaeck yourself. and if they did any welding check the welds for missed spots