Injector Cup Billet Stainless Steel Sleeve Set 7.3L 94-03

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Riffraff Diesel Injector Cup Billet Stainless Steel Sleeve Set 7.3L 94-03

Now Offering our PATENTED Precision CNC Machined Stainless Steel Extreme Duty injector cups and are priced as a kit of 8.


  • CNC Machined for precise quality
  • USA Made Billet Stainless Steel 
  • 100% Designed and Manufactured in USA
  • Thicker wall in weak areas for longer lifespan 
  • Greatly increased durability versus stock brass

With your purchase of the cups, we offer you the option to rent the injector cup puller/installer for $75. The rental fee will be taken from the $499 rental tool deposit paid at checkout, with the remaining deposit refunded upon our receipt of the rental tool in good condition. Simply email us within 30 days when you finish with the tool and we will send you a pre-paid USPS shipping label to return the tool.* 

Our Patented puller allows you to remove the cups without removing the heads or using a slide hammer. Also, by using the tool to grab the cup, you can inspect each cup for damage once it has been removed. Other methods (typically a tap) are likely to damage the cup during the removal process and create shavings that end up in your cylinders. 

Our Patented install tool is really the breakthrough; rather than hammering on your new cups in tight spaces and hoping they are seated, simply use a socket and allow the tool to press the cup in. The tool allows for a completely seated cup every time; no guessing and no hammering, even on the back cylinders or e-series vans. To ensure our install tool doesn't deform your new cup as our competitors tools do, it is machined to engage both the full surface of the cup bottom and the top lip. The tool also features an o-ring as a keeper to allow strategic placement of the cup in the injector bore instead of dropping it in and risking displacement of your sealant. In order to allow the cup to seat without turning in the head, the install tool is engineered to include a ball bearing to prevent cup rotation while being pressed in. 

We also have available for purchase the retaining compound and injector o-rings used by Ford and International when reinstalling the cups. 

*Please note that if the tool is not received back within 30 days from customer receipt, then a $25 late charge will be withheld from you deposit. If tool is not received back within 60 days, you will lose your entire deposit. 


Set Includes - 8 SS Injector Cups and optional rental of the tool. 

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  • 5
    Solid Quality

    Posted by Jack Chandler on Feb 16th 2023

    You really can't understand the quality of these cups until you have them in your hand. They come very nicely packaged, and the machining is on par with the next I have seen. Riffraff Diesel has taken a critical part of your engine to the next level in engineering and quality. From what I see that have made brass cups obsolete with their innovative engineering.

  • 5
    excellent machined product

    Posted by john minyard on Jan 21st 2023

    These are the only cups I will use from now on. They are that good.

  • 5
    Nicely made, tight fit.

    Posted by Bob L. on Jan 19th 2023

    250k + miles. This is the 3rd cup change by an original owner. Did not leak test before assembly. I wanted the injectors in ASAP in case there was any cup movement. Job went very well. Get a pneumatic nail driver instead of swinging a hammer.

  • 5
    Injector cups

    Posted by Jonathan Taylor.. Thousand Hills Farm on Jan 13th 2023

    Very, very happy with the positive interference fit you can feel putting them in. Bought the tool. Super happy with it as well.

  • 5
    Injector cups

    Posted by Ron on Jan 2nd 2023

    So far so good, seem to be a definite improvement over original brass design. Riffraff tool kit was a breeze for remove and replacement.

  • 5
    Excellent Quality

    Posted by Sam K. on Dec 20th 2022

    Really this isnt even a choice. When you see the quality of these billet stainless cups you will know why they have so many reviews. When I started looking I wasnt sure, but now that I have them in hand and have installed them I can tell you they are well made and an excellent choice.

  • 5
    Injector cups and instillation tools

    Posted by Rob on Nov 4th 2022

    Great products great service

  • 5

    Posted by Will on Oct 15th 2022

    Thank you very much you guys went above and beyond.

  • 5
    injector cups

    Posted by JLW on Oct 11th 2022

    Thank You