i got 545 for mine when i had my 6.7

 

PREFORMANCETRUCKPRODUCTS.COM sells the dpf delete and ALLIGATORPERFORMANCE.COM sells the egr delete and i was also wondering what the deal is with 5" exaust i heard dont run it unless your makin some good power like 500+ but i got a buddy that runs it and he is not much over stock just a programmer

 

It's bigger than you need. Too big on the exhaust is almost as bad as too little.

 

i gotcha well thank you for your help and ill talk to ya later