RDP Plenum Reinforcing Inserts™ 94 - Early 99

Part Number:
RDPPRI-OBS

Manufacturer:

$48.76
$39.33
(You save $9.43 )

RDP Plenum Reinforcing Inserts™ - Ford 7.3L 94-Early 99

These billet 7075 Aluminum plenum inserts are a Riffraff Diesel original design and are patent pending. They are made to allow you to clamp down as hard as needed with T-bolt clamps so that you don't have any boost leaks. Fix your bent and crushed stock plenums with our Inserts as well. This is a budget friendly option to buying full billet plenums. Easy install, no special tools needed.

These were designed so as to add the least restriction possible while providing more than adequate structure for clamping. The Plenum Inserts have been machined to within .164" of the OEM diameter so there will not be any measurable affect on EGT's or cfm flow.

These are sold in a pair.

Riffraff Diesel Performance is committed to 100% Made in the USA on this product. All materials are from USA resources. Every machining step is performed in the USA. Every component is assembled in the USA.

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1994-Early 1999 E, F Series, and Excursion Powerstrokes
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  • 5
    Mandatory item

    Posted by Mike N. on Apr 28th 2025

    If you are replacing your plenum boots but keeping the factory plenum, this product is mandatory. The reinforcement insert allows extra clamping load on the boots without crushing the factory plenums. Great product.

  • 5
    Great quality

    Posted by Roger Lovell on Apr 22nd 2025

    These are very easy to install, even on an older intake that might be a bit damaged. You can really crank down on the boots to ensure no leaks.

  • 5
    May require trimming of the intake spider

    Posted by ASA JAY LAUGHTON on Apr 16th 2025

    These installed perfectly but they raise the edge of the intake inlet by about an eighth inch. In my case that required me to trim the same amount from the intake spider that comes from the turbo. These made me confident in being able to cinch the t-clamps down tight, eliminate any leaks. I'd say this is a good product.

  • 5
    Peace of mind

    Posted by ASA JAY LAUGHTON on Mar 3rd 2025

    I got those mostly for peace of mind when attaching the intake boots. I'd read about the potential to accidentally collapse the intake mounting if tightening the bands too much.

    These installed easily, will not really restrict flow and will give me peace of mind when clamping down the boots.

  • 5
    A must with new boots

    Posted by Keith on Feb 18th 2025

    Quality product, these are a must for your truck. Fixes a known issue of the stock tin plenums. Had to tap both sides in to fit because mine plenums were out-of-round

  • 5
    Must have for any stock plenum

    Posted by Matt on Dec 17th 2024

    I have used these on both my 96 and 99 and it is a must especially if your upgrading boots and clamps. Gives me comfort that they are there and I can seal up the boots with no worry's.

  • 5
    Plenum Insert

    Posted by Jordan on May 31st 2024

    I would strongly recommend getting these if you have stock plenums as well as upgrading the plenum boots as well. I had to tap these in a bit to get them in but once seated they fit great

  • 5
    Great invention

    Posted by Steven Schutte on Jun 23rd 2023

    I am really happy with these and glad I got them.

  • 5
    RDP PLENUM REINFORCING INSERTS

    Posted by Ryne Hughey on Mar 7th 2023

    Works great, easy install. Good addition to stock plenum.