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Sinister Diesel has a rating of 3.9 stars from 54 reviews, indicating that most customers are generally satisfied with their purchases. Reviewers satisfied with Sinister Diesel most frequently mention customer service. Sinister Diesel ranks 45th among Auto Parts sites.
Ordered my solutions kit, next day as I was broke down. UPS lost my shipment but still arrived within reason, but damaged. Contacted Sinister and they expedited me another so that I could get my truck back together and headed on my way. A+++
I purchased a 250 amp Sinister Diesel alternator that only lasted 8 months after it was installed. Even though it was past the purchase date not the installation date they were willing to make it right. Now after them sending me 4 wrong alternators. They don't know what to do so I'm playing the waiting game. The old style alternator is no longer available and the new style will not work on a 2007 Chevy Duramax Lt classic. The owner said he will make it right. So will see.
I haven't installed them yet, but the quality of this product looks to be there. Shipping was prompt and accurate. GOOD JOB!
Products used:
HOT SIDE INTAKE PIPE FOR LML DIESEL
A+++ fast shipping excellent service love the overall experience have bought multiple items from sinister always pleased
The extension is very well constructed and classy, Very pleased, The fit is right on, Easy to install,
Sinister diesel water pump 6.0 great! Looks great! Awesome quality! Recommended for all 6.0's
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