Performance exhaust manifold?

[Darkstar]

The 16v manifolds work on 20v heads without a problem. The only thing is that the 20v bolts don't always cover with 16v's holes, so the manifold needs to be trimmed.

Taken from club4ag.com forums:

[6.) Your still probably stuck aren't you? You cannot figure out how you can properly bolt on your factory headers. Upon matching up the original headers to your 20 Valve motor you will notice that the two end bolts of the header do not align up with the bolt holes on the new motor. Anyway, easy fix...take out your hacksaw and cut away the end of your header. You will not need to cut off much, just enough that you can clearly see the bolt holes located in the head of the engine. About half of the bolt hole on the header is enough to be cut off. Once you've cut off the ends of the header, you should be able to reuse the supplied 20 Valve bolts that have washers and bolt on the header with no problems.