Decent website. Lacking customer service. Website was easy to order off of but did not have great descriptions of some of the products. I ordered 2 parts. One wasn't right and the description didn't state enough info. The other part I ended up not needing. 2 emails later and about a week's wait and still no response from customer service about sending them back.

good service quick shipping but exhaust … good service quick shipping but exhaust pipe dose not fit my model even though they said it would before I order it and still claim it does. I had to modify it to run the truck and now will be making custom one right. The wheel base measurements on kit do not my truck and my truck is stock.

took my $ and never shipped my item. took my $ and never shipped my item. 3 months later I have emailed them 4x called and left a vm 4x ZERO REPLY SCAMMERS!!!

Great company to buy from. I purchased a kit for my powerstroke with h&s mini maxx. I couldn't install the tuner tof my truck so I tried to call hs and they are out of business. So I called dieselops.com, someone said they could help me and would send an email with instructions. I waited 2 days for the email before calling another company who sells these tuners, who helped me over the phone within 10 minutes. So long story short, they sold me something at a great price, and didn't offer any troubleshooting help. Won't be using them as a supplier anymore.

Great customer service Great customer service, always got through when I called! The person who answered the phone was able to quickly and efficiently answer my questions. I just installed the kit I bought from diesel ops this weekend and I couldn't be happier!! The only reason I can't give 5 stars is because I ran into to a problem with the tuner, i had to research by my own accord to find out how to make it compatible with my truck. Otherwise 100%