I know it's been beaten to death on this site but I'm going to ask one more time. What is the micron rating for the stock GM filter? If not already, is there going to be a 2micron (or close to) stock filter sometime in the future rumored? I guess the Nicktane is the way to go on primary.....that racor contraption looks like an expensive deal..why the pump? My plan would be to run a 10 micron primary and 2 secondary.