5zigen fireball rattling problems

[Mikeepoo]

Hi,I've had a 5zigen fireball exhaust installed for about 3 years now. Never had any problems, but a couple of months back, rattling started. I can be in neutral or in gear and when I rev up the engine there is an annoying rattling sound. I've checked most everything else and the noise is definitely coming from the exhaust. Any tips would be greatly appreciated.Thanks,Mike

[[s3]]

Probably loose material in your cats, or loose muffler material...take muffler off and shake.