I am pretty sure he is talking about the OS MAX cv .15, if not the cv-r .15. I have two of the cv .15's and I couldnt be happier with them.. Good power, easy to tune, reliable. The cv-r is the same just twice the power. THe only thing I do not like about OS engines is that when you want to rebuild them, you might as well buy a new engine after you add up the price of the parts.
--NooP