Injector Cup Stainless Steel Sleeve Set 7.3L 94-03

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Rental Tool Ships: Same Day

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

Now Offering! Precision 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

We offer to rent you the injector cup puller/ installer as well with your purchase of the cups for a $499 deposit.  We charge $50 to rent the tool which will be deducted from your deposit, which also includes a pre-paid return USPS shipping label that we can email you when finished.  

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 are able to 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 make shavings that end up in your cylinders. 

Our Patented install tool is really the break through since rather than trying to hammer on it in tight spaces and hope your cup is seated you simply use a socket and allow it to press the cup in.  This allows for a completely seated cup every time, no guessing, no hammering, even on the back cylinders or e-series vans. To ensure our install tool doesn't deform your new cup, like other competitors tools, we have machined it so that it engages both the full surface of the cup bottom as well as the top lip.  We have put an o-ring on it so you can strategically put your cup in the injector bore instead of dropping it in and hoping your sealant stays intact. In order to allow the cup to seat without turning in the head we have engineered the install tool with a ball bearing so it remains stationary while you turn in the press.

We also have retaining compound and injector orings available for purchase that is used by Ford and International when reinstalling the cups.

Please note that if the tool is not received back by 30 days from customer receipt then there will be a $25 late charge.  If tool is not returned in 40 days you will loose your deposit.


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

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  • 5
    Better than OEM

    Posted by Chris on Feb 5th 2020

    Great after market product to keep from hopefully ever needing to do injector cups again.

  • 5
    Great product

    Posted by Gary Harris on Jan 22nd 2020

    Have done cups before but the brass ones from Ford. They are such great quality, Recommend as an upgrade.

  • 5
    Very well built

    Posted by Robert on Dec 17th 2019

    I have yet to install due to the heads being at the machine shop still however it’s night and day the quality of this product over the factory cups they’re much beefier and a much better material for the application

  • 5
    great quality

    Posted by Unknown on Dec 5th 2019

    Never seen these anywhere else, but what nice quality they are. Easy install with the rental tool, and for only $50. Saved me $2800+ at the dealer. Thanks guys for making these and for the great pricing.

  • 5
    Amazing Quality

    Posted by Lee Phillips on Oct 28th 2019

    Great set of cups. You can really see the difference in the billet stainless quality. Easy install with the rental tool, so I would recommend taking that option as well.

  • 5
    My advice: change over to stainless injector cups

    Posted by Woody Gentry on Aug 26th 2019

    These cups appear to be amazing quality. Brass cracks, and leaks diesel into your coolant! Ask me how I know this.... Cummins has gone over to stainless, so my guess is stainless is a massive improvement for your 7.3L. Good luck!

  • 5
    Quality Innovation

    Posted by Larry on Jul 27th 2019

    Never seen these before or heard of Riff raff, but after researching it was a no brainer to upgrade from the brass. I bought both the stainless from riffraff and the brass from my local dealer, but returned the brass after seeing the quality and bulk of these innovative pieces. Rather easy install with the supplied rental tool and couldn't pass it up for only $50. I will be coming back after such a great experience!

  • 5
    Great product

    Posted by Robbie on Jul 24th 2019

    These are great quality cup that fit the exact same way as oem. They’re only a few bucks more than oem brass. best part is, they’re made in USA