Fast friendly service, great fit. Thank you
Fast friendly service, great fit
By Donald H.
Monday, November 9, 2026 · Customer reviews of US businesses
The Fair Hearing score
Excellent
724 reviews
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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
Fast friendly service, great fit
By Donald H.
Fast shipping great service.
By john B.
Great service and very helpful with questions I had . H&s mini max is a awesome programmer to delete the oboma filters on diesel trucks today. The pro-flo pipe sounds great and both together gives awesome performance of truck (08 f250 6.4) will give you up to 300hp and gives more mileage on fuel . I went from 11-13 mpg to 15-22mpg on high way and I get about 12-15 mpg in town . Thanks diesel ops for the awesome products !!!!!
By Justin E.
Fits perfectly sounds awesome
By JS
tuner went in after some tech help pipe was a buggar but went on after a little modification..
By terry L.
I ordered a programmer from diesel ops and did not know how to do what I wanted but they were able to walk me through it step by step
By Ethon K.
Easy company to buy from went out of their way to help answer our questions. Honest to deal with and got a great product. We recommended them to a friend and they also got hands down then best for their money.
By reanna S.
Steve took his time to help me when I was in a bind. Fixed me right up!
By NICOLAS C.