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.

I ordered these and was surprised how fast they got here and was just what I need.

good product,professional packaging,fast shipping.

Great products for good prices, great seller. THANKS!

I have bought several products from Riffraff. And they're Great! Quality parts and fast shipping. Would recommend this company to everyone.

Don't cheap out. These are what was made for your motor. The fit was much tighter than the doorman. Price was the same. Shipped across the country in 2 days.