2003-2007 5.9 Cummins tune update
If you have changed the setup on your truck considerably and require a retune this is what you will need.
This applys to single level tuning and also our 4/6 level switch on the fly setups.
Once you have placed an order please email us @ Optimalwelding@gmail.com with current full mod list and what you have changed.
Tune updates will be completed and emailed back to you within 24hours.