Hi, this is my first post here, but I thought I could add to this thread. The Nistune hardware/software  is an very well engineered package to tune the factory Nissan ecu. I've had a chance to tune several SR20 powered cars with it, and if I was given a choice, I would take the Nistune equipped Nissan ecu over a Power FC anytime. Btw, if you look at the Nistune web site, you will see that there is a dealer in the Los Angeles area. 
  
 - Chris