I having been trying to find the answer to this for a little while now and have been given many different answers. I am trying to go turbo and I have a 93 non vtec integra, I have heard that the ehaust manifold for vtec, non vtec and all b-series engines are the same. Hopefully someone can clear this up since some specify only vtec engines. Thanks for the help

 

This is not true. The manifolds vary by yr. make and model. They will bolt up to the head in most cases, but everything else is not a direct fit all the time. Some research has to be done to determine what fits what.

 

by "everything else" do you mean the exhaust ports?

 

No I mean the length, the bends, the flanges, what angle the flanges are at etc. etc.

 

there are other factors like the space between your engine head and the radiator. find someone with a specific B-series 90-93 manifold. i know its a stretch, as there may be very little support.

 

Oh yeah, that too...