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 , 84 votes , 84 reviews
Modifications complete  
Merica!   

I have completed my modifications to my Ram dually diesel! I started with an MM3 tuner with all the sounds, transmission, and horsepower tunes. I installed a four-inch Flo-pro exhaust connected to the downpipe with an inline muffler. The Flo-pro installed without any issues and was a dramatic change from the original in weight change. I removed the cat. conv., muffler, and the soot cooker all of which weighed about 150 lbs. The new exhaust system weighed about 30 pounds.

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Modifications complete  
Johnell Dotson    Merica!   

I have completed my modifications to my Ram dually diesel! I started with an MM3 tuner with all the sounds, transmission, and horsepower tunes. I installed a four-inch Flo-pro exhaust connected to the downpipe with an inline muffler. The Flo-pro installed without any issues and was a dramatic change from the original in weight change. I removed the cat. conv., muffler, and the soot cooker all of which weighed about 150 lbs. The new exhaust system weighed about 30 pounds. Now, moving back to the engine bay the EGR system, and turbo baffles were deleted.

After 1300 miles on a deleted truck, I can say that I am happy with my modifications. The truck performs better, fuel economy is a three mile per gallon improvement, transmission shifts are smoother, and the sound tunes are great. I did all the work myself thanks to the many online videos full of useful information.

Happy Camper  
brownstown, MI   

Bought the MM3 tuner 3 months ago, I heard from the igotacummins website about this tuner. Being an older gentleman I was a little unsure of this tuner. Wife and I pull a 13,000 Lb (MT) 5th wheel. Wow, was I surprised. Pulled our unit with no problems. Can't say enough about there after the sale technical help and support. DRD is the only place I will deal with in the future. I told the members of our camping group

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Happy Camper  
william albart    brownstown, MI   

Bought the MM3 tuner 3 months ago, I heard from the igotacummins website about this tuner. Being an older gentleman I was a little unsure of this tuner. Wife and I pull a 13,000 Lb (MT) 5th wheel. Wow, was I surprised. Pulled our unit with no problems. Can't say enough about there after the sale technical help and support. DRD is the only place I will deal with in the future. I told the members of our camping group the mileage I am getting now, and they couldn't believe it.

Thanks, DRD, Signed a Loyal Customer

Best tuner ever MM3  
Minnesota   

I just got the MM3 tuner for Ray and tuned my truck, and it is incredible. The truck runs smooth shifts very smooth as well. It is a 100% better than my I had EZ Lynk!

Grins  
ORLANDO   

I am 100% happy with the product from DRD; it is night and day when driving the truck now. I looked at several tuning options before going with DRD, but after talking to them on a weekend when they called me because I had some questions even before I bought the product, gave me even more ammunition to go with them. Now that I purchased the product the customer service is still spectacular, answering questions and concerns usually within the

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Grins  
John Romanoski    ORLANDO   

I am 100% happy with the product from DRD; it is night and day when driving the truck now. I looked at several tuning options before going with DRD, but after talking to them on a weekend when they called me because I had some questions even before I bought the product, gave me even more ammunition to go with them. Now that I purchased the product the customer service is still spectacular, answering questions and concerns usually within the hour(by email). I would do it all again.

Pearl is happy!  
Mica, missouri   

I bought Rays custom warp tunes for my 2012. And wow! The throttle response is outstanding. The truck no longer hesitates or is sluggish during acceleration or towing. And the best part, I went from 11.5 mpg to 16.3 mpg hand calculated. The truck runs fantastic and is much happier!! Thank you, Ray!!

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