I have a 99 that as soon as it heats up the exhaust rattles. I have a Greddy Evo II full cat-back but it doesnt seam like it is coming from that.

At about 2600 rpm I get a constant rattle, I thought it would be the cat heat shield so I removed that, nothing changed

Someone told me that on the back of the header there is a bolt that can rust or come loose and start to rattle. Ever heard of this?

Someone also said it could be a defective muffler and that the baffles are loose.

Just wondering if anyone has ever had this problem, and what the fix was. It is anoying the crap out of me!!!!