The new style is a copy of the 6.7 design. They have a raised lip on the portion of the body that mates to the nozzle. Just a circle that goes around the center, and the nozzle has a groove in it to accept it. It was added to try and help the cracking problem. So old style nozzles won't fit on the new bodies. DDP has been using the new style for almost a year though, so you'll have to see what kind you have.