Premium CustomTuning for your DieselGorilla Tuning AutoCal’s provide a convenient platform to distribute custom tunes to our customers. Our Autocal‘s allow us to update and optimize the original tune without shipping and/or removing controllers from customers’ vehicles.Gorilla Tuning AutoCal can be configured in a variety of different ways to best suit the operational requirements and the needs of our customers.If you are looking for more power and performance, see what Gorilla Tuning can do for your Cummins or Duramax!