Ok so I'm wondering which is better if you don't have any emission test to go through. And what brand is the best out there. This is my next step. Is there an egr delete that won't throw out a code and keep my check engine light on. Also why do they even cool the exhaust before going through the egr valve. Is the exhaust really running that hot. Just a new guy to the diesel world. Trying to get this rig running right and keep it that way. I make a lot of trips to do side work and I don't like to call a customer saying my truck broke down I need to reschedule.