I'm running a P trim .70 divided on a stock mani (welded on a T4 flange). My torque curve, which is a function of boost looks like any .68 undivided I've seen on a 7M or 2jz. If there is a difference I think you would need to log your boost curve to see the difference. I do know the divider will develop a hairline crack. I've run 2, on my newset one I ground the divider with a radiud, to almost a point. Didn't crack as bad but still cracked.