port it yourself , if u have a metal rasps.. u can port and flow your self , ive done many heads. Not hard to do, but take your time and look where you are grinding out ok, especially around the valve guides, exhaust ports people always match the port to the manifold!!!!!!!!!! wrong ...doh,, leave a 1.5 to 2 mm of the port smaller then the manifold ok, most important becose that step stops the back flow into the exhaust port ,becose you get a slight stopage of exhaust flow when the valves closes, not much , but enough, it can affect cylinder scavenging, but not to a great extent, just thought i would say. Best to lower the compression if u r going to up the boost to a high degree on a TT......