Perfect fit and an excellent upgrade from the OEM rings that were all blown out.
Super quick shipping and support.

Great company, great product, great price. Fits perfect. Fixed problem. After long day of work came home to my riffraff box, product wrapped pretty good in bubble wrap. Had a few extra goodies which was pretty cool, I'm not a sticker guy, but I do feel they deserve to be on my truck. Will actually put it on my truck because their company is amazing! God Bless RiffRaff! Thank You!

No complaints.
Quality o rings fit perfectly

Fast shipping, excellent quality.

Fast shipping and top shelf product

My truck was burning a lot of oil and running just horrible. Popped all the injectors and found out that most of the orings needed to be repolaced and then i order these. Its been two weeks and the truck runs like it just drove off the showroom.

Great OEM quality O rings, I was shocked at how much these helped my truck. Starts much easier now, no white smoke at start up and more power as it holds the oil pressure up. Much needed as I have 190,000 miles. Used the Riff Raff instruction sheet in the resources tab. Worked great! Thanks for all the help Riff Raff!!

The o-rings came in less than 2 days; can't be the service along with the price. I've had some other problems with my truck and have yet to get it serviceable so I can't rate my o-rings yet. However, I will now look to RiffRaff above other companies when searching for future parts; seems like there is no bullshit in the buying process.

Great o rings complete kit for 8 injectors. After 212k miles I changed out the o rings (they were old and brittle) i saw an increase of hpop psi at WOT from 2300 to 2600 with a T500 on stock injectors.