Where can I get one? Someone suggestion that I get a high performance one and my truck will thank me but the problem is that the person did not bother leave me a message where to get one. I looked and almost no one carry one.

stick with the stock manifold. Junkyard if possible, or ebay

I got one for $90 from the local salvage, but I might have seen new ones for not much more on www.gmpartsdirect.com

http://cgi.ebay.com/ebaymotors/6-5-GM-Chevy-turbo-diesel-exhaust-manifold-RHS-nice_W0QQcmdZViewItemQQcategoryZ33632QQitemZ801601 6947QQrdZ1

here is one ebay.

Thanks that is right hand I need the left one. I manage to save it so I do not need to buy one. Thanks for looking it up.