RDP Plenum Reinforcing Inserts™ 94 - Early 99

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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.


1994-Early 1999 E, F Series, and Excursion Powerstrokes
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  • 3
    plenum inserts

    Posted by mike on Nov 20th 2020

    I like the concept but I could not get my Y pipe to line up correctly. the lip made the intake to tall on the passenger side. had to clearance the y pipe on the passenger side to allow proper fitment to the turbo.

  • 5
    RDP plenum reinforcing inserts

    Posted by Shannon on Oct 17th 2020

    Great product, you will have to very gently tap them in with a mallet/ block of wood. Works well with the new RiffRaff intake boot set and new clamps.

  • 5
    Plenum inserts

    Posted by Josh Robins on Jun 24th 2020

    Perfect fit. Went in easy, able to tighten boots nicely.

  • 5
    Platinum reinforcing insert

    Posted by Musas on Jun 15th 2020

    Perfect fit, awesome product save you the hassle of boost leak definitely recommended

  • 5

    Posted by Alejandro on Jun 3rd 2020

    Great product, easy to install. First ordering from Riffraff and It was fast. We definitely use in the future.

  • 5
    Plenum inserts

    Posted by Rob on Oct 7th 2019

    These things are awesome. Made installation of the boots so much easier.

  • 5
    Amazing product!

    Posted by Mike on Jul 16th 2019

    This helped me out tremendously, not only was the fit perfect (you will need to use a rubber mallet to get them seated) but I was able to crank down on the T-bolt hose clamps and stop my boost leak. Even if you truck is stock I highly recommend these, with the inlets being reinforced you can make sure you won’t have a leak there!

  • 5
    Rep plenum reinforcement

    Posted by Ben on Jun 17th 2019

    Good product and easy installation.

  • 5

    Posted by denise ward on Feb 28th 2019

    perfect fit fast delivery