One of the things that is talked about on here is the fact that the exhaust manifold is restrictive and the holes are too small.
I was looking at a company that does head work up by me and it seems that they port standard exhaust manifolds to give them better breathing without having to spend hundreds and thousands on a new manifold.
Just keen to hear peoples thoughts on this and whether they think it is worthwhile/possible on the vx220 manifold?
Cheers
Bob