Great service The part was direct fit and easier to bolt on than factory style. No issues with shipping. Happy to do business with you every time so far.

Tuner purchase never came Tuner purchase never came I purchased a tuner early during the week with express shipping , customer service didn’t help at all . Canceled purchase

Ordered a Sinister Hot Side Inter… Ordered a Sinister Hot Side Inter cooler tube, boots, and clamps, got great updates on where my order was at and got it delivered fairly quick which I was worried out with the Corona ordeal. Thanks, everything looks great quality!

Great company to work with Ordered a couple Charge pipes due to Ford being on national back order and Sinister Diesel was able to help out with having theirs available. Great quality products, friendly service and quick responses.

Good parts good quality I appreciate the quality and quickness of arrival of their parts their welds and craftsman ship. However ups usually does horrible shipment and sometimes leaves knicks and scratches which can be annoying but that’s ups’s fault. All I ask of sinister is more sales products as I feel as some of their items overpriced yet I want to buy 80% of my parts from them I only buy some here and there because they are so expensive compared to oem