[Smart Bob]

I would check your engine mounts. Worn mounts can cause the engine to shift where your exhaust system can ground out against the frame.

 

[Smart Bob]

I would send these photos to Madness. Looks like the exhaust may be bent. Also, the heat shield is sometimes removed on aftermarket exhaust installations to allow clearance. In the 2nd photo, it looks like the exhaust is off at an angle.