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 Multiple Patent Pending 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
    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

  • 5
    Best Quality on the market

    Posted by Justin on Aug 8th 2022

    These are by far the best cups I have ever seen. They go above and beyond from the way they are made, packaged, shipped fast and USA Made! Really can't ask for a better product.

  • 5
    Stainless injector cups

    Posted by Unknown on Jul 26th 2022

    I used these in my 94.5 7.3. Only been in for about a week so far so good. I would definitely use these again over the brass cups.

  • 5
    Excellent Quality

    Posted by Grant on Jun 30th 2022

    Well packaged, and very good quality kit. Used the rental tool option as well which made the job so much easier.

  • 5
    Injector Cups

    Posted by Cam on Jun 13th 2022

    Great quality and installed very smoothly with the rented riff raff tool!

  • 5
    Excellence in Manufacture

    Posted by Zach Shaw on Jun 7th 2022

    Lets start from the top, customer service was on top of answering all of my questions, before, during and after the install. Shipping was quick and I had tracking with hours of placing my order. The injector cups came in a custom box, and every cup was nested/separated from the rest for the ultimate in protection. The quality and precision of these stainless cups really can't be appreciate until you see them in person. Install was a breeze with the rental tool Riffraff provides as well. I went from an almost $5000 job quote to doing it myself for under $500. You guys are my go to shop from now on! Thank you for all of your help and support to do this job myself.

  • 5
    Stainless Injector Cups

    Posted by Jim Wills on Apr 14th 2022

    The packaging was excellent and represents just how nice these cups are. After looking at each and every one you wouldnt believe how nice the quality is. Very durable, as well as and excellent machining. I would highly recommend this and their rental tool as it made the job almost a breeze.