Originally Posted by IamNemo
Depends...do you have an EX? If so, your stock manifold is already pretty damn good and you probably wouldn't see much in the way of hp gains. Any other model besides LX, you'd probably see a little bit of gain.
I'm guessing you have an older Accord, because on 6th gens, there is no difference in the manifold, engine, intake, exhaust, etc. Same identical motor as opposed to 5th gens.