Making DRD Better! Smarty MM3 Tuners are now shipped with our Tunes installed and much more!

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*

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Welcome To The Double R Diesel YouTube Channel!

We provide Custom Tuning & Performance Parts for the 2010 – Current 6.7L Cummins Ram Trucks.

Phone: (877) 515-1776 – Contact Us Here

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(Fourth Update) Shooting For 700RWHP on our 2017 Cummins 6.7L

Everything is finished. Time to start her up!

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