How much would I lose?

I'm going to sound like a pompous *** here, but milling the divider does not make it a single plane. The name dual plane comes from the over n under runner arrangement not the centre divider.

Nah, you didn't sound like a pompous ***...I had the volume turned down! lol :mrgreen: Just messing with ya! I think you may have mis-interpreted what he meant, tho. I think he was just telling me how to get a little more HP out of the dual plane, not really turn it into a single plane. Basically to try to even the playing field a little more between the two different styles of intake.