Riffraff Diesel HPOP Billet Reservoir Cover 99-03 7.3L Powerstroke
Our robust HPOP Billet Reservoir Cap allows for a cost effective replacement of the stock part while incorporating a 76% larger than factory -6 ORB fill port. Available in 6 vibrant color options and comes with stainless steel replacement mounting hardware.
Features:
- 100% Made in the USA
- Complete replacement cap with larger billet fill plug featuring a Viton® seal
- HPOP Reservoir Top Cover Viton® o-ring
- Stainless Mounting Hardware for cover
- 6061-T6 Billet Aluminum Construction
- Anodized for a Custom, Long Lasting Appearance
*Note: We recommend the optional RDPHRC-Bolt Stainless Steel bolt kit to replace your factory hardware with your new billet cap. If you are running our Mini or Large Spacer you already have the correct bolts.
*Note: Anodized Color on Aluminum can be discolored / damaged by chemical engine cleaners. Use only soap and water to clean.
OEM Part number: F81Z 6A655 AA

16 Reviews Hide Reviews Show Reviews
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Billet HPOP RESERVOIR COVER
Looks great.
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RIFFRAFF DIESEL HPOP BILLET RESERVOIR COVER 1999-2003
A must when adding the matching reservoir and 2.0 spacer
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Was ok
Looks good on the truck the bolts it comes with stripped out so I had to use my old one and hard to get a socket on the bolts that hold the plastic cover out
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Work of Art
Like all of Riffraff Diesels parts this is another work of art. Perfect fit, and they go the extra mile to include stainless hardware with it. The large fill port really comes in handy, fits a standard funnel and allowed me to fill the reservoir quickly and without making a mess like I usually do.
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Clean and Quality
Very nice, way better than OEM and some how cheaper as well. The stainless hardware is a very nice touch. The larger fill port makes it much easier to service.
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Was a great fit and looks good
I really like the top The blue looks nice everything fit perfect
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Simply Awesome
Great replacement part over stock. I stripped out my factory lid fill plug hole. This one is way better, much easier to fill. I also recommend the stainless steel bolt kit Riffraff offers for mounting these. Very clean and the way to go.






