exhaust pipes banging against leafs??

Ive got the flowmaster american thunder exhaust system. I had it professionally installed and welded. but later on down the road I put a revtek 3in leveling kit and some bigger tires. and now when i hit a small rut, bump, pothole, etc etc. i can hear the pipes banging against something. So i got under the truck and looked and apparently its banging against the leafs? (everything is locked in and the pipes are not loose at all) I was wondering if anyone else has this problem or if there is any way to fix this.

thanks

 

take it back to the exhaust shop...

 

i just have blocks in the rear. and it did this before but it was because the pipe hanger had come out of one of the hangers and that cured it until i put the leveling kit in

 

yea but its dark outside where im at. i just got off work. ill get some pictures up in the morning.