The only Hughes test I see for the Street Dominator was when they weld modified the plenum to 4150 style from the original spread bore carburetor opening. We have not modified the plenum but quickly ported the runners and gone from 270 cfm average to 306 cfm average. I don't know when we will get to do more work, but one port was so bad it got a little more attention and picked up 53 cfm.