They have a promised shipping window…
They have a promised shipping window and it far exceeded that. Other than shipping issues, no problems
About Sinister Diesel
Data updated- Website
- sinisterdiesel.com
- Category
- Vehicles & Transportation
- Location
- United States
- Status
- Unclaimed
- Last 12 months
- 64 reviews
- Replies to negative
- 44% (8/18)
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About this business
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 generatedReviewers 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.What people say
They had the part I needed in stock and…
They had the part I needed in stock and it was delivered fast.
Cummins Coolant Filter Kit
I ordered the coolant filter kit for a 2006 Cummins. The box arrived without the aluminum filter block. Sinister responded to my email right away and shipped one out same day, so great customer service. Kit was very high quality.
So far so good
So far so good. Haven’t installed it yet though
Everything
i didn't know the part was on backordered
i didn't know the part was on backorder till after I ordered it, that being said they had it to me before the time they said I would after backorder. Product looks great👍
Received in timely manner and was…
Received in timely manner and was exactly what I ordered
I bought a blemished exhaust tip
I bought a blemished exhaust tip. It does what it needs to but an accurate description of the blemished part would have been great not a generic pic that’s not helpful at all
Reply from Sinister Diesel2025-01-30
Hey Rowdy, thank you for the feedback. We are always looking for ways to improve the customer experience. I have forwarded your suggestion to our team. We appreciate it!
Everything was as advertised
Everything was as advertised. No issues and it fit perfectly!
Great price and very helpful product
product did not fit as perfect as my expectations were with this brand
product did not fit as perfect as the price reflected i thought i need to tweek the mounting bracket more then i should have to insert into the mounting hole of the removed air filter. still not sure how long the tube will stay on the air intake with the close radius also. time will tell
Reply from Sinister Diesel2025-01-14
Hey Chris, we are sorry to hear that you had trouble with fit. We have not had that issue come up before; we appreciate feedback to improve our products. One of our customer service reps did reach out to see if we could send you an extra boot/clamp to give you peace of mind, but she said you declined. We work hard to provide 5-star customer service and products, so please reach out if you have any problems. Thank you!
Quick delivery and great product!
Order was a little wonky at first but…
Order was a little wonky at first but they did everything to make it right. Parts work great!
Product Shipped Right Away
The website is user friendly, product selection is great, prices are competitive and the parts I ordered shipped without delay. I’ll definitely be ordering again from y’all soon.
The ordering and shipping process was…
The ordering and shipping process was super easy and they delivered as promised. Haven't installed the pipe yet, bit thats coming soon amd I'm expecting good things!
Grea follow up
Great follow up on an issue I had with installation. It was refreshing when a company really has customer service.
Part arrived in the expected time was…
Part arrived in the expected time was correct part. Installed easily and appears to be functioning as advertised
Promo codes cannot by used with points…
Promo codes cannot by used with points earned from previous purchases.
Reply from Sinister Diesel2024-12-27
Hi James, at this time no, we do not stack codes with other discounts. We work hard to provide the best customer service and quality products in the industry.
Purchase experience was super efficient…
Purchase experience was super efficient and the products were delivered as expected. Once installed, the products work and look amazing!
Great greatprice great quality great…
Great price great quality great customer service
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