HPOP Large Capacity Billet Reservoir Spacer

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Riffraff Diesel 96-03 7.3L HPOP Large Capacity Billet Reservoir Spacer 

Need more oil to run your large single or dual high pressure oil pumps? We have developed the largest reservoir spacer on the market and it will allow you to have an additional 135cc of oil in the reservoir no matter what HPOP you are feeding. By allowing additional reserve you won't have to deal with rough starts, running out of oil on WOT or P1211 code.  Originally we only made these on request for dual pump customers and project builds, but with the demand growing we decided it was time to produce it for retail.

We have also made sure that the JIC and ORB ports are functional and allow easy connection with many popular pump setups on the market while not interfering with existing OEM sensors and lines. All ports allow full flow both on feed and return so that there is zero restriction, which is very important as the IPR dump lines when restricted can effect IPR operation. This allows you to simply install and run our spacer instead of running to the hardware store to find fitting to make it work.


- Billet HPOP Reservoir Spacer
- Upper and Lower Motorcraft Orings
- Custom Coated Longer Mounting Bolts
- Misc Plugs and Fittings for varied applications

100% Made In The USA with USA Materials

 *Note: Anodized Color on Aluminum can be discolored / damaged by chemical engine cleaners. Use only soap and water to clean.

1996-2003 7.3L Powerstroke - Will Not Fit 94-96 - It running stock fuel bowl you will have to modify your fuel lines - Make sure 96-Early 99 screen gasket goes on spacer not front cover.
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  • 5
    Quality and performance

    Posted by M Stowell on Jul 7th 2020

    This is great upgrade and for me was a must as I have the early 99 7.3 and The screen was not add till late 99 and beyond. The extra capacity and protection/performance it brings will help keep you Powerstroke singing on down the road.

  • 5
    7.3 !!!!!

    Posted by Panagiotis on Nov 29th 2019

    This is a NICE piece !!!
    Yes, you need to play around with the fuel lines. Or do what I did , have CnC fab make up a custom set of SS line. I will add, ALL the positives that have been said about this it are TRUE ! Now, can we get these in the Red also.....

  • 5
    hpop large capacity billet reservoir spacer

    Posted by richard harrah on Nov 1st 2018

    installation was easy excellent and a very solid and well made piece and as always Clay is great to work with.One of the few places that wont try and sell you something you dont

  • 4
    Great product and service

    Posted by Unknown on Oct 12th 2018

    My only issue has been stated before. Wish it cam with kit to make stock fuel bowl use easier. Be it a drop bracket, or a line kit available.

  • 5
    Great product

    Posted by Unknown on Mar 4th 2017

    Great product and really happy with the way it looks. Just don't understand why riff raff doesn't do free shipping on large orders like other sight

  • 4
    More Oil For The Injectors...SWEET!

    Posted by Dave J on Oct 20th 2016

    I don't get a code at WOT anymore...Does it's job, Nuff Said! Only 4 stars cause the groove for the O-ring seal is not an exact match to the OEM seal. During install, the O-Ring got pinched and cut in half cause it didn't fit well. Had to order another one and wait a couple days longer to complete the install. The next O-ring, I used dabs of wheel-bearing grease to hold it in the machined groove. Plus, I received the wrong color. Don't care about that as much as not getting the code anymore, so no big deal. Thanks Riffraff for offering a product to feed more oil to the injectors!

  • 5
    Extra oil, yes please!

    Posted by Patrick Loughlin on Jan 17th 2016

    Excellent product, does what it says, as mentioned below, you do have to do a little mods to make everything work with it, but it is worth the time and effort.

  • 4

    Posted by Unknown on Oct 14th 2015

    This thing is beautiful! It was super easy to install, My only issue was in installing with my existing stock fuel bowl. I was able to gently persuade the passenger side 1/4" fuel lines. I was also able to gently persuade the fuel inlet line on the drivers side but the fuel return line required cutting and sourcing 6" of 5/16" fuel injection hose and 4 fuel injection hose clamps.. I would like to see the parts be available as an add on option, where the only hose requiring modification being the relatively low pressure return line i didnt see the harm in using fuel injection hose for the patch.. I also used a brake line flaring tool to flare the ends of the fuel line just to give the hose clamps something to grab onto. OVERALL great product!

  • 5
    Perfect for dual Hpop mounting

    Posted by jwlandry on Apr 2nd 2015

    I recently purchased the reservoir spacer because I was planning on installing a set of Terminator dual HPOPs. This spacer made the plumbing of those pumps super easy any super clean under the hood. Excellent fit and easy install. Plus the blue is just amazing. Pictures do no justice.