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
    Injector cups

    Posted by Austin Murphy on Mar 15th 2024

    Bought these along with the tooling from Riff Raff. Cups are absolutely beautiful parts. Install was easy with tooling, I did notice these had a firm feel on the ratchet as they settled into the cylinder head, and a solid set as they bottomed out. Made sure to wipe any bearing mount off the injector bore once seated. I also noticed that the injectors were a tighter fit with these it seemed like. Not in a bad way, just that these are a better, tighter tolerance. Great product.

  • 5
    Nice update

    Posted by Airport auto tech on Mar 1st 2024

    Thank you so much

  • 5
    Best Quality Injector Cups

    Posted by Brad Jacobson on Jan 28th 2024

    These are without a doubt the best quality injector cups. They came very safely packaged, and you can tell the quality from the start. Just for fun I took a set of calipers and measured them to check just how accurately they were machined. I couldn't find a single issue with any of them. Riffraff Diesel holds standards that the rest of the diesel industry should take heed and do their best to achieve.

  • 5
    Stainless injector cups

    Posted by Brandon on Dec 14th 2023

    So I purchased these for my personal truck after heating mixed emotions over the brass cups. They arrived beautifully packaged and machined to a high standard. I installed them using the press in tool and worked wonderfully. Will hopefully not have any issues. Strongly recommend the press in tool if installing while motor is in vehicle.

  • 5
    Quality Injector Cups

    Posted by Justin Brooks on Dec 12th 2023

    These stainless injector cups are high quality, and as a machinist I can appreciate the attention to detail. I honestly cant believe they offer them for this price and are making them in the USA. My hat is off to Riffraff Diesel for showing the competition how quality parts are made by USA trades. Good job!

  • 5
    The last set you will ever need

    Posted by Phil on Nov 5th 2023

    Wow, The quality of these parts is amazing. You really will not realize it until you hold one in you hand. Install is a piece of cake with the RiffRaff tool and it will literally be the last set you will ever need. Outstanding. Thanks RiffRaff.

  • 5
    The best

    Posted by Cyrus Mohit on Oct 3rd 2023

    As you can probably tell by all my reviews... I install these every time I do injector cups. They are by far the best!

  • 5
    The only cups I install!

    Posted by Cyrus Mohit on Oct 3rd 2023

    The only cups you should ever install in your 7.3 Powerstroke!

  • 5

    Posted by Cyrus Mohit on Oct 3rd 2023

    The *only* injector cups you should install in your 7.3!