Ask Brian how much more customizable the Bazzaz map is (it took a lot longer to do than a PC III). You can map out all of the throttle positions from 0-100% in 10% increments and also the 5% position and the rpm range is from 4000(?)rpm-to top end in 500RPM increments. Also it works on all eight injectors instead of four, and you can add things to it such as a quick shifter, autotune module, and traction control system. If you are wondering why it matters about the secondarty injectors, think of this...the secondaries kick in above 5500 rpm or when the throttle bodies are open more than 50 degrees. If that really does anything i dont know, but i think the results speak for themselves and Brian as well.