I have a 1999 Tahoe and have done some upgrading to the engine. I recently added headers but have run into the problem of the passenger collector gasket blowing out. I have tried several types of headers but it results in the same thing. If anyone might know how to fix the problem it would be greatly appreciated.

I have a 2006 Chevy Silverado 1500 z71 with the 5.3L motor and I am looking for headers. I haven't had much luck finding them and I was wondering if the 99 - 05 manifold is the same as the 06 and would those years fit hte 06.. If anyone could give me some insight, it wuold be greatly appreciated. Thanks in advance.