friend has ds on alchohol stock everything but white bros. slip on . bought vortex for ds and is very unhappy.said all he can tell changed is rev.. vortex said he needs to get it reprogrammed. 400$ plus what ever it will cost to reprogram for alchohol.. thats crap, so.... if you know of a nother cdi or somthing he can get programed for less than 600, that would be nice.