I have an OM606 NA out of a 96 E300. I am in the process of acquiring all of the fittings and supplies i need to make a pop tester in order to bench test the injectors using a bottle jack. The only fitting I can't find because I do not know what it is called needs to go into a 1/4" female NPT on one side, and on the other end one of the injector lines off the car need to screw onto it. I would really appreciate if someone could help me find the fitting I need.