this isnt a KA vs SR thread...or a KA vs CA thread...
its just a discussion of reasons why we got the other motor
there had to be a legitimate for the change...all the engineering when they couldve used the same plans as international versions..

example: aussie s15's didnt get boost gauges on the a-pillar because of crash saftey issues.

the one thing i could think about is maybe american emission standards..[cali]