I have a 2012 3500 6.7 Cummings with the 6 speed Auto- 8500 miles. I also live in area that does not require Emmison Testing - will removing the regerator filter and programming the computer to ignor it do any damage to the systems ????

 

Welcome to DF

I would leave it alone, But that is your choice.

 

Wityth the price of fuel going up- up-up I could use thew extra 3-5 MPG ?? Will it do any harm as I questioned before ???