I just had my BBK Shorty MidPipe installed with my Flowmaster 40's.
Around 2nd gear and 2,000 RPMs I'll hear a buzzing coming from the passenger side exhaust, it lasts about 3-5 seconds than stops.
I took a look at the exhaust and couldn't feel/see any holes in welds, and everything is nice and secure.

Any ideas on what it is or how to stop it?
The exhaust job only cost $95 so I can't really complain.

 

your cat probably clawed your cats. lol

 

Actually it's a O/R Pipe, theres only ONE cat allowed in the garage

 

were the flows welded in or is it the whole catback? which cat? MustangCat or you kitty cat.

 

Welded in.

 

Bump for an answer

 

my hanger for the tip used to rattle against the back of the tip. Got that fixed and now another buzzing started, Im just gonna dynamat the entire inside!

 

Hmm, I'll check out those hangers, didn't consider that...