Help with exhaust system

[BoatsRcool]

ok i put on a dynomax bolt on cat back awhile back. ran fine, but all of a sudden now it rattles at different speeds... could it just be loose somewhere?? it rattles like at idle, and other speeds sometimes. i havent checked the tightness of the clamps yet, but i will after school today. thanks

 

[aldive]

Various harmonics can cause excessive vibration and that might be the source of your noise. Do indeed check all your clamps and mounts.

You might want to take it to a muffler shop and have the system welded at the joints.

Good luck.....