yup. There were two styles of common rail rocker boxes. One with and one with out the injector harness. Then there are two styles of gaskests....one with and one with out the injector harness. I cant remember when, but they switched the injector harness from the rocker box to the rocker box gasket (or vice versa). Either way, look for the rocker box and gaskets with out the harness in either. Theyll be from separate years.
The question is....why?
The question is....why?