I think my b pipe is vibrating against the body tub and causing some noise at full back pressure....Please help, its driving me nuts.

 

Some of the guys at the muffler shops i took it to, said that it might be because i don't have a flex section...
Please help!!

 

Have the rubber 'hangers' that suspend the pipe checked. They may be stretched out and need to be replaced. In my case, I needed to have a shorter one installed to accomodate a different size aftermarket exhaust. (Greddy)