"Awesome looking product, installation was simple, took about half an hour. Installation instructions were thorough and helped. Truck runs great and it looks great on my engine. I shopped around and even waited a little longer cause this part was on back order. But I wanted this part because it’s so simple and clean looking. Bolts right up to stock grid heater. Gaskets included and hardware"

- Ben Watkins

"Order was shipped same day and arrived on time. The Cold Air Charge Pipe for my 6.7L is very well made and looks amazing. I will be making more purchases from Sinister Diesel"

- Tracy Gill

"I reviewed a handful of products from various vendors before I opted to purchase the oil bypass filter from Sinister Diesel. The final factor for me was the installation location and overall appearance of their bypass kit. The purchase process was a breeze. I received the parts quickly. The parts were packaged very well. Installation was well documented and took me about 1 hour to do the install and oil change. I have about 3 weeks on the filter and you can still see the difference on the dip stick. I will be submitting oil samples for testing as I near 5,000 miles sometime this Summer. Cheers!"

- Rick Hagelberg

"Sinister diesel made my ordering process a breeze. And my whole order arrived without any issue. Install was very easy with everything i purchased as well. I have absolutely no complaints and will not hesitate to use sinister in the future."

- Damian Hughes

"Two years ago, I put the cold side pipe on. this past week. I put the hot side pipe on and both of those together make a tremendous improvement. Turbo lag is now at a minimal response."

- Dennis Weits

"Hands down the best customer service!!! Excellent product. Couldn’t have asked for a better brand to stand behind for my 17 F250. Still ordering to add to my preventative maintenance."

- Greg Assaf

"Intake looks amazing and the sounds I can hear from the turbo are awesome. Quality looking and feeling kit will definitely be buying more from sinister diesel"

- Russell Caldwell

"Awesome products! Easy to install! Really improved my 6.7 diesel performance and power!"

- Brendon Hayes

"Blue spring kit and heavy duty oil cooler is just what my 6.0 powerstroke needed! Good quality and the truck is running great."

- Landry Creen

"Parts fit up nicely! Installation wasn’t too bad and the directions were pretty straight forward If needed! Cold air intake and both cold and hot intercooler pipes installed!"

- Ryan Stanton

"Love sinister diesels products. Everything is direct bolt on and easy to install and works great. Shipping is really fast too. Got my truck looking nice. Still a lot more I wanna get."

- James Denington

"Great product, fast shipping, super responsive customer service. The part was priced super reasonably. Very glad I found them"

- Tyler VanDrimmelen

"Absolutely perfect shopping experience. Customer support was great and answered all of my questions about my part. The website and purchasing process was easy to navigate. I will definitely be purchasing parts here again!"

- Samuel Vaden

"Very noticeable difference in throttle response and power. My 6.7 Powerstroke has woke up and is now fun to drive!. Better pulling power when towing especially through the mountains! Very stylish look with the blue anodized powder coating!"

- David Huff

"I ordered the 4" to 5" tip from these guys. Shipping was quick and the tip was well packaged. It would have taken the shipping company running over the package to damage it. The quality of the tip is top notch and has a solid construction."

- Dustin Hamm

"Great ! customer service Super ! Professional. very good quality merchandise. fixed the issue with my truck. would definitely! recommend. looking! forward to future business."

- Rodney Cook