Separates oil blow by from being redirected into the intake to be burned off. Oil lowers the effective octane rating which lowers performance. Also, keeps the manifold, intake, and throttle body area cleaner and free of oil.
Hey guys sorry for the delay in pics. Yes they are both designed with the same concept I just went with BT because they produce everything in house. I have owned some DS products which were all good, I just figured I would help out the "little man".. Pics will be up tomorrow.