Okay, this may be a dumb question, but I have to ask: how many ports are their per rotor on a 20b? Looking at a typicaly intake manifold, I would guess there are two ports per rotor: a primary and a secondary. In other words, there isn't an third "auxilliary" port used on the 20bs, right?
-Bug

 

your absolutely correct. all 20b's are 2 ports per rotor, or a 6 port in total engine, but dont get it confused with a 13b 6 port.
cheers