Great company
Had a great deal on great product and very fast shipping will buy from them again
By Rodney A.
Monday, November 9, 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.
Showing 615 reviews with 5 stars · Clear filters
Had a great deal on great product and very fast shipping will buy from them again
By Rodney A.
I will be honered to use Diesel-Op again.
By Rodney M.
Great service! Fast to respond to my ?s and got me the best price. Thanks guys
By Robert O.
Parts fit as they should and all parts were of high quality
By SSP C.
expected May 5 as they promise but receive it April 27 so impressed
By Edgar A.
New to the diesel world and when I needed helped they where eager and friendly I'm educating and leading me to what I wanted, not just what cost a lot. After searching about 15 stores, they are hands down the best price. Honestly, even if they raise prices I would use them just for the amazing customer support. Look forward to doing more business with them.
By Timothy H.
Very happy with my choice to buy from Diesel Ops. Will do business again!
By Jason H.
I called not knowing what to expect. They gave me a discount and they were very helpful to all of my questions.
By Brian D.