It looks like you can't get injector tubes for the 5.9 any more. The ones for the 6.7 work but have a larger passage for fuel delivery. I'm about to put injectors in my 05 (50Hp DDP). I didn't plan on installing new injector tubes unless one was damaged. Since these tubes aren't exactly the same as the rest could I change just one or do I need to get all six? Will the larger passage alter the fuel flow between injectors if some are 5.9 and some are 6.7?