Don’t get rid of your OEM INJECTORS! Have them cleaned and flow tested at your local injector shop. I paid $20 per injector with 1 day turn around. I would replace head bolts and clean all carbon buildup from EGR passage in the upper intake. Basically you should replace every vacuum line...
I think it’s different depending on what year you have. I have a 14 model and mine is a little different than the earlier year models. Bleed all 4 globes and evacuate the entire reservoir tank replacing with new on a 14 model. My reservoir tank is behind rear right wheel house liner, earlier...