I recently traded injectors with a friend of mine and Im having some problems. I was running a set of RC750 injectors which were way more than I needed. He turboed his car so I traded him for his RC440 injectors. Now my injectors came off of my b16 intake manifold his came off of his K20 manifold. We switched the rubber seals and everything and the 750s fit perfect for him, but when I went to put the 440s in they wouldnt fit right. Its like the injector wont go deep enough into the fuel rail. Anyone have any input on this? I thought all RC injectors were universal you just had to use the right rubber gaskets. Thanks...