Peter Nachtwey
Member
That truck probably 'deleted' the diesel practiclate filter and doesn't use DEF. There are other mods that are illegal in some counties in WA.I had an unpleasant experience last night stopped at a light next to a lifted RAM 2500 with side pipes and a 6.7 liter Cummins. His exhaust completely flooded my car (a cabin air filter can't do anything about gases) and I literally had to back up in traffic to stop choking.