looks like they did the same thing as doo did with there REV 650 as i like to call it..they took a bottom end of there 700 and but 600 jugs and pistons...so its really not a all new engine...but it definatley fills a nitch for all the 600 gotta have it guys....talk about a long time we have to wait before we can find out if this sled is as fast as the REV 600....many many months of bench racing haha...same HP as the REV ... they dynoed the REV at amsnow shootout at 118 hp right???