Originally Posted by Mattback

sds will be better ultimately for more power and what not, but youll lose conveniences usually. it's also not going to be nearly as clean as nissdata. nissdata is a much betteer solution for a street car. for a race car i think sds could get you the job done a little bit better, because youre only interested in one wide open throttle powerband, and sds lets you fine tuneit much much much more. if i had an sr / ca i would do nissdata without asking questions. and come on, it's much less than $1200 for sds!