Its probably detuned slightly for a few reasons:

the power gains are very minimal

gas quality cannot always be ensured

people do not maintain their cars as well as they should and honda knows that


The integra wasn't supposed to be a race car, its a daily driver with a tuned engine. It has a warrenty, good gas mileage...all that stuff so that people that don't take care of their vehicles don't blow them up 2 years out. Real sports cars need all kinds of maintenence all the damn time, the wilder the tune, the more down time basically. Honda had to make a compromise with the B18 SOMEWHERE =)