Awesomeness
Love diesel ops. They
By Razo
Sunday, November 8, 2026 · Customer reviews of US businesses
The Fair Hearing score
Excellent
724 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Shop Aftermarket Diesel Parts for your Cummins, Powerstroke, Duramax, or any Diesel Vehicle. We specialize in quality products with better customer service!
Diesel Ops (dieselops.com) has 724 customer reviews on The Fair Hearing, with an average rating of 4.7 out of 5.
724 approved reviews, newest moderated first
Love diesel ops. They
By Razo
Limited installation instructions provided. Company that manufactures the item is out of business. Sales person we spoke with had limited knowledge of the product and its installation.
By Consumer
Response from Diesel Ops· Dec 20, 2016
Hello Ben, I just tried to call and follow up with you regarding your order. I can assure you, everyone here is very educated on these products and we are always available for support or concerns. I do not see notes or any calls from you in our system regarding the order or the products. Please give us a call if you would like help or a link to the instructions that are available on each product on our website. I look forward to hearing from you, -JD
Great customer service and very fast shipping
By Andrew
I was drawn to DieselOps by the free shipping, and the plus of a 10% discount to military members drew me to place my order with them. The first half of the order arrived in lightning speed, but the second half is taking longer. Holiday season casualty!
By Dave L.
I ordered a part for my boyfriend's truck for Christmas. I placed my order on Cyber Monday, on my lunch break at work. Chris helped me figure out what I needed (since I know nothing about trucks), and got my order placed in under ten minutes. He made sure I was informed, and got me on my way. Awesome!!!
By Customer
great product, fast shipping, does not answer emails
By Customer
Response from Diesel Ops· Jan 11, 2017
Hello, I am sorry you had trouble getting an email response, I am not sure where you sent it but please feel free to contact me directly with any issues or needing anything else, I will gladly take care of this and give you my direct email address. Thank you and we look forward to getting this and any future business taken care of Chris (Sales Manager) 888-992-7299 ext 702
I recently bought the Fass 150 and got it for a steal during the cyber Monday deal. It was also delivered pretty fast, within 4 days. And by the way, Diesel Ops supports our troops and veterans, so as a vet myself, that is greatly appreciated. Thank you for the awesome service!!!
By Mike I.
Fast shipping, Great service, same parts at a better price
By Customer