U don't need to add a programmer, use a "Canned Tune" from the InTune or do a custom CMR tune but you may want to. If you do, you'll realize the full potential of the intake and exhaust mods.
But I understand that the Gen 2 6.4L engines don't respond as well to the programmers as the 6.1L engines do and I would attribute that to a more aggressive stock tune and a more aggressive camshaft. But I still think the programmer will help.
But I understand that the Gen 2 6.4L engines don't respond as well to the programmers as the 6.1L engines do and I would attribute that to a more aggressive stock tune and a more aggressive camshaft. But I still think the programmer will help.
