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March 2023 by Devon Biehn
Awesome customer service and prices
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December 2020 by Jeff Donabedian
Dane at Mad Jack Diesel is the best! He’s always smiling and eager to help you out. I just purchased his EZ-mount bypass bracket with my new Amsoil bypass system, and he even gave me a discount.I also (and finally) bought a fuel filter access door for my truck. These are a game changer for your fuel filter in your duramax truck!!! Why aren’t these coming with these from the diesel factory? ??♂️?Anyhow, thanks again Dane! You can’t go wrong here.
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September 2018 by Nick Sommer
Very knowledgeable and helpful! Will use again!
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June 2018 by Killswitch
Customer service is #1. Had a small part missing from my package. No hesitation in a reply and apology followed with a guarantee to ship the part asap! Other parts companies could learn from these guys. -Trevor
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May 2018 by Matthew Perry
Excellent customer service! Very knowledgeable and patient with all my questions.
