Mazda is making a regular habit of showing sexy concepts at auto shows that could be feasibly be future vehicles. The Kai concept seen here in New York is most definitely the best looking Mazda 3 to ever come from Hiroshima. More than the Kai’s curvy shape with a notable lack of creases is what goes unseen, the Mazda Skyactiv-X internal combustion engine. This hybrid of gasoline and diesel ignition promises a more complete burn through compression with the aide of a spark plug only when necessary. Sound interesting? Even if they can’t get the future of ICE figured at least there is some hope for extreme styling that might actually make it to showrooms.