The valve dosent close it tight, so it must leak and since the exhaust will flow up the other valute, and thru the valve.. It will create turbulance.i will thiken the center structure so the valve seats better.

So so far Ive got this thing to hit 27psi at 4100rpms, then it sees 29psi at 7500rpms with an airflow of 55.6lbs/m which is more then the average 8blade puts out. Prolly cause the bolt on housing limits the flow to 52lbs/m and the stock twin scroll is too laggy to allow our motors to see the 8blades potential.

LINK is estimatin 489hp right now. With a much better torque curve then the Borg warner with the same set up showing 450hp