Riffraff Diesel HPOP Billet Reservoir Cover 1999-2003

Part Number:
RDP-HRC

Manufacturer:

$146.11
$123.74
(You save $22.37 )

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
  • 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

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  • 5
    HPOP Billet Reservoir Cover

    Posted by AC on Apr 8th 2025

    Very Nice product, perfect fit, better than OEM

  • 5
    Highest Quality!

    Posted by Josh on Feb 25th 2025

    I put my name on a waiting list to get the blue version of this hpop reservoir cap. I wanted to match the other blue riffraff stuff I have put on my truck over the years. As usual it came with a very nice finish and perfect fit. Their stuff is always OEM quality or in this case much better!

  • 5
    Billet Cover

    Posted by Jason on Dec 22nd 2024

    Paired perfectly with my Riffraff billet HPOP reservoir, and way cheaper than stock. The larger fill port also makes topping of the reservoir much cleaner process.

  • 5
    Excellent Upgrade

    Posted by Gary Rice on Apr 3rd 2024

    This was a no-brainer to upgrade, way cheaper than Ford wanted for the stock cover, and way nicer. Also the larger fill hole is so much better and easier to use than the stock one.

  • 5
    Awesome cover!

    Posted by Kevin on Sep 23rd 2023

    Perfect finish & fit, I love the larger fill hole and the fact of not having to worry about stripping out the allen head!

  • 5
    Excellent Quality

    Posted by Frank Evans on Jul 20th 2023

    Way better quality than OEM, larger fill plug, and not to mention WAY less expensive the OEM. Best of all Made IN THE USA. TEAM RIFFRAFF for the WIN. Keep it up guys.

  • 5
    Well Made

    Posted by James on May 16th 2023

    So much better made than stock, and the larger fill port also makes it much cleaner to fill with oil.

  • 4
    It’s good

    Posted by Thomas Gray on Apr 10th 2023

    It’s good. Looks great but my only complaint is that it should come with a new o ring even if it raises the price. Or at least include an option to add an o ring so the guys like me that would think it already comes with one don’t get screwed and have to wait to instal.

  • 5
    Billet HPOP RESERVOIR COVER

    Posted by Ben Ross on Feb 13th 2023

    Looks great.