I might switch to one this winter...I need air cleaner clearance. And since I shift around 6200, I think this will work even better than the big single plane, but I am not totally convinced its that good, I kinda need to see it.
If I do it, I am going to mill out the center divider and run an open phenolic spacer though. And If its only -11hp on the top end but +30ft-lbs on the bottom....Good by 1.33 sixty foot.