No, I didn't run dyno. Power gain you can see in the video above, also low and mid range improved a bit. Much nicer to drive it dailydid you dinorun you Lude? what's the power gain? is it much faster than stock F20A4? I'm having same engine and thinking 'bout doing something to this vegetable. DOHC head is a good option as it's not hard to find H23 head cheap