I ran the 3 port for 1 race day and love it. I have about 1 gallon thru it and it still has too much metal pinch to see its full potential. I am running the 7mm insert and OS 2050 pipe and being able to pit at 8 minutes on a pretty large track. Still have the extra shim installed, too. Can't wait to get this thing outside and have it fully broke in.