Folks, after getting your feedbacks in the past couple of days, I have purchased a set of stock exhaust manifold and have a friend's mechanic (specialized in Honda and Acura) install it for me. Instead of paying $600 for the dealer, I pay less than $400! I just want to say, thank you! for all the responses that I got from you all. I didn't realize a user forum group would give me so much helpful advice.

Happy holiday guys.

- james