Thins i would start with is a egr blocker and code stoper from kennedy diesel and than you can add a turbo back exhaust best one out is a mbrp but almost all 4" systems are pretty good! as for the air intake the lbz has a great intake stock so leave it alone for now!!! and for programer i would either go with a predator or an excelarator from PPE they are the best 2 out right now but edge juice should be out sometime soon!!!!!
Good luck
Caleb
Good luck
Caleb