Perfect
Super fast shipping. Good product description.
By Ron
Sunday, November 8, 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.
724 approved reviews, newest moderated first
Super fast shipping. Good product description.
By Ron
Good product, fast shipping, phenomenal customer service over the phone with step by step help from Chris. Thanks guys super satisfied.
By TCM E.
The engine got more RPM than normal
By JOSE MARIA G.
Response from Diesel Ops· Jan 11, 2017
Hello Jose, I am sorry that you had an issue like that we do have some solutions if that does happen I would be glad to run over with them if you would like. thank you and I look forward to making this right with you Chris (Sales Manager) 888-992-7299 ext 702
My exhaust system came a little early than what was expected and i was very pleased with it
By Tyler S.
I got product your title said 99-03 when received diamond eye tag said 99.5-early03 your invoice also said 99-03 it doesn't fit my truck I have early 99
By Luke L.
Response from Diesel Ops· Jan 5, 2017
Hello, when we spoke I was happy to take the exhaust back and get you refunded no problem, I am sorry you had any issues and I am sorry that you had a problem with the Early 99 OBS. These are trucks that can be a problem in the past on getting parts for. looking forward to hearing back from you to get this taken care of Thank you Chris (Sales Manager) 888-992-7299 ext 702
They had exactly the part that I was looking for for less than others. Shipping was fast and free.
By CustomerGreg
The website was easy to use and checkout was smooth. Shipping was fast but the product arrived with some minor damage. After sending an email, I promptly received a phone call, but they seemed reluctant to offer any assistance. I was still able to install the part, but I don't feel that I should have to repair a $200 part in order to use it.
By Andrew
Great product can't wait to install it
By Customer