Always a fast and easy shopping experience. I've bought several Ford 6.0 trucks this year to fix up and use building each one with the bypass oil & coolant filter setups as well as the fuel regulated... See more
Company replied
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Review summary
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Reviews shaping this summary
I use the turbo pipes to make work trucks more reliable. I had two different trucks with 6.7 deletedPowerstroke hot side pipes fail. I bought new oem pipe, which immediately failed, first on one truc... See more
Company replied
Always an easy process to find and purchase my desired products. Literally have everything made by sinister on my 6.0 and 6.7 Powerstroke diesels. Great quality on every product, with absolutely no is... See more
Company replied
Quick shipping no BS. I grabbed a "blemished" intake & saved some bucks. Honestly it didn't look bad whatsoever & I was glad I could save some money. I installed it with my kid on Christmas and holy... See more
Company replied
Company details
Information provided by various external sources
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.
Contact info
United States
- sinisterdiesel.com
4.6
Excellent
4K reviews
No recent history of asking for reviews
This company hasn't invited customers recently, so reviews may not be representative
Replied to 100% of negative reviews
Typically replies within 1 week
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Great quality parts
I received the part(s) as ordered within the estimated delivery date despite it being on backorder. The fuel filter was professional engineered and fabricated. I have yet to install it but looking forward to getting this installed so I can drive my truck worry free.
26 January 2026
Unprompted review
Reply from Sinister Diesel
Thanks for sharing your experience. We’re glad the order arrived within the expected timeframe and that the quality and engineering stood out to you. That peace-of-mind feeling is exactly what we aim for with our fuel system components. We appreciate your business and hope the install goes smoothly. We’re here if you need anything along the way. And let us know if there's anything we can do differently to earn that extra star.
Good parts!
22 January 2026
Unprompted review
Reply from Sinister Diesel
Thanks for the feedback! We’re glad you’re happy with the parts. We appreciate your support and look forward to helping you again.
Great intake kit
Intake kit for a 2000 ram 2500 5.9 cummins. Works as designed. Great fit and finish.
1 January 2026
Unprompted review
Reply from Sinister Diesel
Thanks for the review! We’re glad to hear the intake kit fit your 2000 Ram 2500 as intended and that the fit and finish met your expectations. Our team puts a lot of care into the design and build of every part, and we appreciate you choosing Sinister Diesel.
Great quality product!
4 January 2026
Unprompted review
Reply from Sinister Diesel
Thank you for the feedback! We’re glad the quality met your expectations. Our team takes a lot of pride in building products that perform and last, and we appreciate you choosing Sinister Diesel.
Great company to work with and order…
Great company to work with and order from. Part of my order was on back order they let me know promptly and gave me a date that it would ship. Items did indeed ship on the date given and arrived promptly!
11 December 2025
Unprompted review
Reply from Sinister Diesel
Thank you for taking the time to share your experience. We’re glad the communication around the backorder was clear and that everything shipped and arrived right on schedule. Keeping customers informed and delivering when we say we will is something we take seriously.
We appreciate the opportunity to earn your business and look forward to helping you again in the future.
Too expensive for what it is
Too expensive for what it is. I ordered a different brand that's polished aluminum for less than half the price and same quality
30 December 2025
Unprompted review
Reply from Sinister Diesel
Thank you for taking the time to share your perspective.
Our pricing reflects U.S.-based manufacturing, materials, quality control, and the customer support that backs every product we sell.
We appreciate you giving Sinister Diesel a try and wish you the best with your build. If you ever have questions or need support in the future, we’re always here to help.
Still waiting on refund
Fast shipping. However, my truck took a crap before it arrived so I never took it out of the box and shipped it back immediately. That was 2 weeks ago and still haven't received the refund. Emailed them to ask them to please initiate a refund but nothing. Would appreciate it if you all could do that ASAP.
Order SO#57432
Thank you and have a blessed day.
18 December 2025
Unprompted review
Reply from Sinister Diesel
Hi Katie, I forwarded this to our customer service on the day you posted this, and she let me know that your refund was scheduled for that day and she had touched base with you. Let us know if we can help you with anything else moving forward.
Good coolant filter kit
Good coolant filter kit. Instructions could be better so you don't have too make phone calls and wait for a response for clarification. Web site should also state that it might or might not work with aftermalet air filter kits. I have a S&B filter kit and I had to force the air box back in place because it was hitting against the bracket.
Update; I changed my review from 4 to 5 due to Sinisters communication.
18 December 2025
Unprompted review
Reply from Sinister Diesel
Thank you for the honest and detailed feedback — we appreciate you taking the time to point this out. While we’re glad the coolant filter kit itself performed well, we understand the frustration around unclear instructions and unexpected fitment issues.
Your notes about clearer installation guidance and compatibility with aftermarket intakes like the S&B kit are helpful, and we’ll be reviewing both our instructions and website details as a result. Feedback like this helps us improve the experience for future customers.
We appreciate you bringing it to our attention, and if there’s anything else we can help with, our team is always here.
Reply from Sinister Diesel
Thank you! We appreciate you taking a moment to share that and are glad you had a great experience. If you ever need anything down the road, we’re happy to help.
Quick shipping no BS, solid product.
Quick shipping no BS. I grabbed a "blemished" intake & saved some bucks. Honestly it didn't look bad whatsoever & I was glad I could save some money. I installed it with my kid on Christmas and holy smokes my diesel whistle is proper now. Sounds freaking amazing! I'm looking forward to putting on the steering box brace I got too. Waiting on my socket & will be putting it on shortly.
24 December 2025
Unprompted review
Reply from Sinister Diesel
That’s awesome to hear — thanks for sharing the experience. We’re glad the blemished intake delivered the value you were hoping for and that it still looked good once you had it in hand. Installing it with your kid on Christmas makes it even better, and it’s great to hear that whistle came alive the way it should.
Sounds like you’ve got some fun upgrades lined up next with the steering box brace. We appreciate you choosing Sinister Diesel and are here if you need anything along the way.
Out of Stock
Before ordering I called multiple shops for labor quote. Informed them of expected install week 12/15. I ordered on 12/2 and have not recieved the product yet...12/23. A couple of days after ordering I was informed to delivery location was not valid. Worked with agent to change to home address vs selected mechanic. At this point the product was out of stock and became a backorder. Also earlier this year I ordered a FICM, not showing on me history of purchases can this be fixed. Product sent to same home address....Jackson Ms 39213.
2026/01/08 - Thanks for the followup. The product is exactly what I wanted...hope to have it installed by the end of the month.
1 December 2025
Unprompted review
Great product
Great product. Only issue I had was the mounting bracket had to be modified some for the banks grid heater delete. Have to cut about 1/2” off of the back side by the intake if you have the banks intake and heater delete.
18 November 2025
Unprompted review
Reply from Sinister Diesel
Thanks for the detailed feedback, we really appreciate you taking the time to share it. We’re glad to hear you’re happy with the product overall, and thanks for pointing out the fitment note with the Banks intake and grid heater delete. That kind of real-world install insight is helpful not only for us, but for other customers as well.
We are talking with the team about a modification to this part soon. If you ever have questions during an install or need help on a future upgrade, don’t hesitate to reach out.
Always a fast and easy shopping…
Always a fast and easy shopping experience. I've bought several Ford 6.0 trucks this year to fix up and use building each one with the bypass oil & coolant filter setups as well as the fuel regulated blue spring modification.
10 December 2025
Unprompted review
Reply from Sinister Diesel
Really appreciate you sharing this! It’s great to hear that ordering from us has consistently been quick and easy for you. Sounds like you’ve had a busy year with those 6.0 builds — and we’re proud to be part of each one with our bypass kits and fuel pressure upgrades.
Thanks for continuing to choose Sinister Diesel. If you need anything for the next project, you know where to find us.
Another satisfied customer
Always an easy process to find and purchase my desired products. Literally have everything made by sinister on my 6.0 and 6.7 Powerstroke diesels. Great quality on every product, with absolutely no issue. Ever. Tip of the cap to this company.
9 November 2025
Unprompted review
Reply from Sinister Diesel
Thank you for such an awesome review — that really means a lot to our whole team. We work hard to make the buying process straightforward, so it’s great to hear it’s been consistently smooth for you.
And having Sinister parts on both your 6.0 and 6.7 is something we definitely appreciate. Hearing that everything has performed flawlessly with zero issues is exactly what we aim for when we talk about delivering a 5-star experience.
Thanks again for the trust and the tip of the cap — right back at you. We're here anytime you need us.
Great Products and Customer Service
Great Products and Customer Service, easy Online Shopping and Timely Confirmation and Delivery.
10 November 2025
Unprompted review
Reply from Sinister Diesel
Thanks for taking a moment to share your experience. It’s great to hear that everything—from the products to the online checkout to the delivery updates—hit the mark for you. We put a lot of effort into making things smooth and reliable, so feedback like this really matters.
We appreciate you choosing Sinister Diesel, and we're here whenever you need us again.
2014 Cummins 6.7 heater core plugged up.
The quality and detail of the coolant filter kit was excellent. I would recommend this kit to address debris removal that clogs the heater core causing no heat on the drivers side. Flushing the system with a quality cleaner and coolant replacement at the time of the filter kit install speeds up the coolant clean up and corrected my poor or no heat issue.
15 November 2025
Unprompted review
Reply from Sinister Diesel
Thank you for taking the time to share your experience with our coolant filter kit. We truly appreciate you leaving a review and helping other customers understand the benefits.
At Sinister Diesel, we pride ourselves on delivering 5-star products and customer experiences, so it’s great to hear that the quality, fitment, and results met your expectations. Your detailed feedback about pairing the kit with a proper flush and coolant replacement is extremely valuable and will definitely help others facing the same heater core issues.
We’re glad the kit helped restore your heating performance, and we appreciate your recommendation. If you ever need anything else, our team is always here to help.
Never told me my order was on backorder
The website never told me that the part was on backorder, nor did I receive any email stating that. It took two weeks before I reached out, wondering where my part was, and that is when I found out it was on backorder. Finally, I received an email a week later saying that the order would be delayed another week. I would have liked to know that my order was on backorder to begin with.
26 October 2025
Unprompted review
Reply from Sinister Diesel
Thank you for taking the time to share your experience with us. At Sinister Diesel, we pride ourselves on delivering a 5-star customer experience, and we truly appreciate you bringing this to our attention.
I’m sorry that the backorder notification didn’t reach you and that the website didn’t clearly communicate the delay at the time of purchase. That’s not the level of clarity or service we aim to provide. We understand how frustrating it is to wait on a part without being informed up front.
Thank you again for your patience and for giving us the opportunity to improve.
Positive Experience on customer service…
Quick reply on customer service request. Real people that you can understand and understand you on the other end of the phone. The item I purchased worked well for my application. As a 1st purchase it was a positive experience.
18 November 2025
Unprompted review
Reply from Sinister Diesel
Thank you for taking the time to leave this review. We’re committed to delivering a true 5-star customer experience at Sinister Diesel, and it’s great to hear that our team was able to help quickly and clearly.
We’re glad the product worked well for your application and that your first purchase with us was a positive one. We truly appreciate your feedback and your trust in our company.
If you ever need anything in the future, we’re here and happy to help.
I didn't like paying extra for 3 day…
I didn't like paying extra for 3 day shipping and it taking over a week to be delivered
17 November 2025
Unprompted review
Reply from Sinister Diesel
Hi Eric! I sent this on to our customer service dept to see what happened here, but we were unable to find an order with your name. Was it perhaps ordered under a different name?
GREAT PRODUCT AND SPEEDY DELIVERY TIME
4 November 2025
Unprompted review
Reply from Sinister Diesel
Thanks for the review! Glad the product and delivery hit the mark. We aim for 5-star service every time, so we appreciate you letting us know we delivered.
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