I was pulled over for no mud flaps last week in the tx hill country. The state trooper was asking what i was doing there. I said I've been driving for about 25 mins trying to clean this dpf, which is happening almost every month now btw (truck miles 89k). Anyway thats when he told me "u know u can remove all that def stuff as long as you have a muffler and resonator". Does anyone know if this is true?