RDP Plenum Reinforcing Inserts™ - Ford 7.3L 99.5-03
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.
178 Reviews Hide Reviews Show Reviews
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Plenum Inserts
Well built and since I was in there, I may as well make it better. Easy install fit perfect.
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Plenum inserts
Luckily I bought these with riff raff’s boot set and clamps. The stocks one were bent and warped. I tapped these in gently and it allowed me to get the new boots in nice and tight.
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Awesome, this is my 2nd set
Put these in my 7.3 Excursion, now in my 7.3 F250. They do just what you think they would: keep you from crunching the sheet metal plenum opening with too hard a twist on the plenum boot clamp(s). With these installed, I think I would break the clamp before I deformed the plenum sheet metal. They are SUPER thin aluminum, but incredibly strong. They fit tightly into the sheet metal plenum opening and have a lip on the top edge to keep them in place. My old Excursion, with the old factory rubber plenum boots, would start leaking every 5-10K miles. Instead of replacing the rubber boots (duh), I would just ratchet down on the factory clamps and clean out the valley. It took me a long time to get around to ordering some fresh plenum boots. With the F250, I ordered the whole kit: boots, clamps and inserts. So far so good, and I don't expect to have to go back in there to tighten the clamps any time soon. If you've got a high mileage 7.3 that leaks around the plenum boots, do yourself a favor and just order the 'kit' and be done with that leak. Then you can focus on fixing the 50 other leaks you have:)
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Great product.
Takes the worry out of destroying your stock pkenums. Work great.
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You didn't think you need these, but you do
I was honestly surprised how much my intake plenum inlet was squeezed in when I installed these. These are the BEST peace of mind you can buy if you're currently budget minded in your build and are wanting to help stop any boost leaks.
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As advertised.
Worked great. Can really torque the clamps. No leaks.
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Worked perfectly
You cant go wrong if you purchased these for stopping boost leaks. Perfect fit!
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These fit perfect
Fit perfect in my 7.3. I was able to really crank down my new T clamps.
Just as advertised, a great product. -
Excellent product
I had a intercooler boot blow off about a month ago so I decided to do the whole deal. Ordered a new set of boots, t-bolt clamps and these billet inserts all from RiffRaff. The inserts are excellent quality and with a small piece of 2x4 and a mallet they tapped right into place fixing my old plenums. Well worth the price.
