We are always striving to make things easier for our customers. Our MM3s are now being shipped preloaded with our custom tuning for the customer.
We also discuss resources available on our website to help all our customers with their tuners and tunes.

Please check out the informational guides found by clicking the highlighted links below.
The information and the videos in the guides below will help you with most of your questions and troubleshooting issues.

*MM3 Tuner Questions & Answers Guide*
*MM3 Tuner Troubleshooting Guide*



Video link to our website: https://www.doublerdiesel.com/making...and-much-more/