Just got a measurement on the XR head intake port, It's the same as the XX. I wouldn't see it making any notable power gains considering the Intakes are the same. Tim or Bo, Do you know of anyone with a flow bench to test them and put this to rest or not?
I'm familiar with all of the in & outs of your last few posts. I was merely asking if there were any numbers on it, not doubting your build. I've done allot of research on the XR motor builds and was just looking for a number to reference.