I have an 87 GTA with an 88 L98 out of another GTA. It's got 3" flowmaster from the stock manifolds. I want some headers. Are summit headers worth buying or no? What are the best headers for the money? Also, what do I have to do about the oxygen sensors? And one last thing, I have never done an install before, would it be real difficult and what kind of problems can I expect to run into? Thanks.

 

Hooker 2055s, come with a 3'' y pipe. About $350.