Sinister Diesel Reviews 

Fast shipping. Good quality part.

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.

Works awesome installed easy 😎

Fast shipping and great product. Looks good

Every item so far has been solid and as described ,

High quality parts and an excellent price! Fast shipping!

Online- spot on
Order arrived in timely manner

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.

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.

Not the greatest customer service. Had to call twice for order issues. First time I called they were rude second time I called was better. Parts I ordered had no real change in performance. More for just color and look under the hood.

Great quality products at competitive prices

Great customer service. Received part in a timely manner in good conditions. Core return was posted sooner than expected

My experience with sinesterdiesel was a positive experience highlighting their attentiveness, quick delivery, and helpful service.Only issue/problem I had was with the clap that came with my cold charge pipe. It doesn’t stay around to lock.

Quick shipping on my egr and cooler kit. Kit saved me about 800$ over mechanics sourcing of parts.

Tuner purchase never came

I purchased a tuner early during the week with express shipping , customer service didn’t help at all . Canceled purchase

I received my package on a well manner time frame an it was well packaged. Looking forward to doing more shopping for diesel parts.

Great Products, shipping, and service!

going on the 5th business day now since i placed an order, and it still hasnt shipped. i even paid the extra cost for 2 day shipping. if i would have known it takes you guys a WEEK to ship out i wouldnt have wasted my money on the priority shipping.

degas bottle not fit for 6.0. send back. not full refund -$70
exhaust manifold was stolen. no refund. no replacement.
customer service (Marsha Eubank) HORRIBLE. didn`t help any.
never had such a bad service. work before with AFE power, Mishimoto and Banks never had a problem like that

Should read reviews before..