Cant seem to find much info on this area. I took a look at gasket outline on my head and will be opening the port to gasket dimension exhaust only. When i put the gasket against the exhaust manifold its also a terrible alignment to the ports. Has anyone modified this area to be smoother / better flowing? The biggest question is has anyone looked at the exit end of this manifold and the alignment to T3 inlet? This also looks poorly matched and has a mass restriction due to the cast form. Anyone tried to remove the centre area for better flow?
The picture shows the sections in the centre that I am considering grinding out. May affect strength / distortion but who knows until its tried. Surely the flow would be improved?
s-l1600.jpg 281.99K 3 downloads