Sinister Diesel is your one stop shop for Ford, Chevy, GMC, and Dodge diesel performance parts. Sinister Diesel is also the number one source for Diesel Racing Components, Exhaust Systems, Tuners, Ford Powerstroke, Dodge Cummins, and GM Duramax engine repair parts, upgraded EGR coolers, lighting, bumpers, grilles, and suspension components from our parent company Sinister MFG & Sinister Diesel®. We offer the biggest names in the industry to help you repair or modify your Powerstroke, Cummins, or Duramax diesel engine.
Is Sinister Diesel legit?
Sinister Diesel (sinisterdiesel.com) has a 4.5 out of 5 rating on OK.one, based on 198 user reviews collected here. It is listed under Vehicles & Transportation and its reputation is excellent. 86% of reviews are 4 stars or higher and 6% are 1 star; The business has replied to 44% of negative reviews; Reviews mostly discuss Product, Quality, User experience. Last updated 2026-09-08.
What reviewers say
AI generated
Reviewers overwhelmingly had a great experience with this company. Customers frequently praise the high quality and outstanding performance of the products, noting that everything works exceptionally well and fits their trucks perfectly. People also appreciate the fast shipping times and secure packaging, making the entire purchasing process remarkably smooth and easy.
However, some people mentioned frustrating issues with unexpected backorders and prolonged delivery delays. A few consumers also noted that certain replacement parts required unexpected modifications or extra adjustments during installation. Despite these occasional challenges, most buyers remain very satisfied with their overall purchases and intend to order again.
Auto-generated from all reviews of this business. For reference only.
The got good parts but the up charge the hell out of everything and shipping prices are ridiculous
Reply from Sinister Diesel2024-08-16
Hey Connor - I sent a request for more information from you because in searching our customers, the last purchase I could find was in 2022. Did you purchase under another name or can you provide an order number? We like to provide the best customer experience possible and would like a chance to see what happened here. Thank you!
My truck was down and needed fixed so I could get back to work so I ordered my part overnight. When my part didn’t arrive I contacted them and Amanda was there to help. She was generally concerned that there was a problem with the shipment and refunded my overnight fee and kept an eye on where my package was. It came the following day and I was able to get my truck back on the road. If I didn’t apologize to her for being frustrated I want to do it now. Amanda I realize that I may have been short with you and I’m sorry. You were very professional and I want to thank you for all you did. I will buy from you again.
They made up for an obvious issue. I was originally told after ordering that it would ship well after me core arrived as they did not have the item in stock. The page I bought from did not specify the item was back ordered or out of stock. That should be fixed by the company by at least having you call to confirm availability.
They agreed to ship it 2 day as it was going to be a holiday when they would have them in stock.
Not only did they upgrade it to 2 day but it was shipped the week before they had planned to have it in stock.
Product works well and would look great if you could see it after it's installed. A flash of blue from a couple angles
I'm overall happy with the product and delivery but have noticed an overall issue with items not being in stock and there being no notice until my money is gone
Simple solution to a simple problem. Call for availability. Serious people will call!
Thanks
The turbo is amazing, however, the only reason that it did not get five stars is the packaging is terrible. The turbo is heavy and poorly packaged. The box arrived with holes in it, and the turbo had scuffs all over it from being unprotected.
Reply from Sinister Diesel2024-08-14
Hi Jerry! We are sorry to hear that the turbo arrived in a box with holes in it. Our turbos are usually packaged in a super thick box with heavy duty instapack. We are checking stock right now to make sure they are being packaged correctly - we appreciate your feedback. In the future please reach out if an item arrives damaged and we will see what we can do to assist you. We do love to know that you think our turbo is amazing! Thank you for your business.
The only issue I had was that I was promised a delivery time and the part arrived outside that window. This was not the fault of Sinister Diesel but with UPS. Overall experience was great.
Sinister Diesel is absolutely fantastic! Ordered some apparel from them and they were out of stock on one of the items. No problem, just ordered a new choice. Then I mentioned that one of the items was now sewn completely and they didn’t blinks eye and no hesitation they replaced the item. Stand up company. I definitely recommend them for all your needs.
I’m completely pleased with Sinister Diesel! The ordering process was easy and plenty of products to choose from that you’re guaranteed to find what you need.
Wow I’m impressed. Yes the injectors took time to get but the customer service and quality of the part was above and beyond.
These injectors are the only ones your truck will ever need. Don’t cheap out.
Easy to find the part, really should not have went out in the first place. But glad they had it. It was the on an off valve for the water filter. Was leaking. Poor construction is all I can think, plastic ball valve. Got 3 years out the older one. The price you pay for this stuff should be made unbeatable.
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