The above manifold is a volumetric copy of a Mountune, I ran it on my demo car for some time to develop it. Performance wise it got me a 13.1 quarter at Elvington.

My other manifold which is a based on a Pulsar plenum has recorded 380bhp at 26psi on my ZVH.

So I feel it is a little unfair to sugest that we dont know what we are doing!

Simon.