chris is right, but dont forget that the SAFCII lets you adjust between +/- 50%, at 200 RPM levels instead of 500 like the old one, also you can save up to 2 different map settings, kinda nice for street and track use, unlike the previous model, data memory will not wipe out when all power from the vehicle is disconnected

got mine from Leo at www.jdmspecperf.com