come to think of it its what I have on mine about $75.00 each ,with mine I had broken spot weld after 2 weeks from high engine revs,is why I am going to cherry bombs though they have life time warranty ,there is no chamber in the bombs so should be no rattle they were surprised to hear that happened ,but it just tinny sound every now an then ,they said it was the installer or just happen one in every 10.000 mufflers ,other then that I love the sound ,but that sound is comeing from inside the muffler only one of them