I am have a very tought time installing my injectors. I have the correct seal rings that go into the intake manifold from the dealership and a set of 550 RC injectors. I have lubed up the seal ring and around the injector base and the bastards are really hard...actually impossible to squeeze in. Obviously the stock injectors fit fine. Does anyone else have this problem or know how to get them in. So far, I would rank RC Injectors a shitty score on fittament!