nathanfirebird1

I've been looking around on the site and everyone is talking about different header options. I want to run them but don't have the money for them right now. Can I run the stock exhaust manifolds that were on the engine? It is out of a 04 yukon. Really new to this and could use any info related to this part or not. I found the complete stand alone harness and new pcm for 650.00. Good price? thanks