Customer Testimonials

Testimonials from our Customers

Our success shines through our customer testimonials. Take a minute to see what our customers are saying about us. If you are a customer and haven’t let us know how we did, please leave us a review below. We’d love to hear from you!

Company : Double R Diesel LLC
Website :
Aggregate Review : Customer Reviews:  5 out of 5 , 114 votes , 115 reviews
Great experience and awesome product  
East Texas   

Installed my Express tune with 30HP after installation of a FLO~PRO 4” exhaust. WOW!!! After 166k miles, I’m kicking my own butt wondering why I didn’t do this immediately after purchasing the truck. I pull a 40’ cargo trailer 90% of the time pushing 5-6 thousand miles a month it’s like I have a new truck!!

Thanks, Ray and your DRD team!!! God Bless!!

Best product on market  
Colorado   

Man where to start I did a lot of research before I purchased and out of all DRD was the best and had nothing but good reviews, so I pulled the trigger and bought the full tune package and pillar mount. And I'm glad I did the end product is fantastic it's like driving a whole new truck has all the power I will need just on the 60 horse tune I haven't gone past that just yet. The customer

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Best product on market  
Matt hubbs    Colorado   

Man where to start I did a lot of research before I purchased and out of all DRD was the best and had nothing but good reviews, so I pulled the trigger and bought the full tune package and pillar mount. And I'm glad I did the end product is fantastic it's like driving a whole new truck has all the power I will need just on the 60 horse tune I haven't gone past that just yet. The customer service is the best if you have any questions they will get back to you promptly. This is your one-stop shop — best on the market by far. When you purchase DRD products, it will be well worth it.

No one beats these guys!  
Charleston SC   

Double R Diesel are true professionals at what they do. I emailed both of these gentlemen over and over with new questions, and they were more than happy to help me. I didn’t have to wait longer than 10 minutes for a response!!! Not to mentions how clean the tunes were and how easy the whole process was. Rays YouTube videos are much appreciated also. Keep up the good work guys!! I will remain a loyal DRD customer for life!

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No one beats these guys!  
Kyle kraemer    Charleston SC   

Double R Diesel are true professionals at what they do. I emailed both of these gentlemen over and over with new questions, and they were more than happy to help me. I didn’t have to wait longer than 10 minutes for a response!!! Not to mentions how clean the tunes were and how easy the whole process was. Rays YouTube videos are much appreciated also. Keep up the good work guys!! I will remain a loyal DRD customer for life!

Incredible update  
West Virginia   

I recently contacted Ray about an SD card that had become outdated, as these things do. Ray let me know that the updates were ready and should impress me. Two days later I had a new card with the system updates and new tune files, and boy was he right. I would have thought my truck was stock before. If you have Ray’s tuning, be sure to check with him periodically, I believe he gets better and better with his

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Incredible update  
Scott MacLeod    West Virginia   

I recently contacted Ray about an SD card that had become outdated, as these things do. Ray let me know that the updates were ready and should impress me. Two days later I had a new card with the system updates and new tune files, and boy was he right. I would have thought my truck was stock before. If you have Ray’s tuning, be sure to check with him periodically, I believe he gets better and better with his skill. THANK YOU RAY!

All I can say is wow!  
PA   

First off, thank you, Ray, for your quick response and delivery of tunes. I loaded these tunes on earlier this morning and my god. Going from box tunes to Rays is night and day. No more throttle after I let off the pedal, even transition in power and the low-end torque is insane! I highly recommend anyone out there using any other tuning to switch to Rays tunes, simply amazing.

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