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.
199 Reviews Hide Reviews Show Reviews
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Function and form is Perfect!
This allows you o use a good set of t-clamps and make sure you have got a good tight seal around those intake boots without damaging the plenums
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Great product
Great product installation was easy and no more boost leaks from my stock intake plenums.
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Great idea and excellent fit
I was replacing my CAC boots after a turbo swap and decided to install these inserts, it is a great peace of mind to know you can tighten these down and not damage the plenum. The OEM plenums will bend very easily and become out of round, don't let this happen or you will develop a boost leak. Great product and easy install, Highly recommend it.
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Innovative idea and a great fix for a poor OEM design
The machine work and finish on these were great and what an awesome idea to fix a poor design. All this for $40.00. Can't beat these and the time it takes is minimal.
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Great product!
These worked well, allowed for a lot more ability eo tighten clamp.
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Great quality
I bought these because i was pulling the spider for boot replacement. They are very well machined, and make total sense to purchase. I strongly recommend. If are in there for any reason, do yourself a favor. Buy these and prevent future headaches.
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Quality product
It just makes sense to install these when you are upgrading clamps.
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ANOTHER GREAT IDEA!!
Plenum inserts $39. 4 t bolt clamps $16. 1 day shipping, $5.95. The ability to LOCK DOWN the plenum boots, and have 0 boost leaks...
PRICELESS. Thanks again RDP for another great product, and awesome customer service. -
Great product
Installed these as part of my turbo replacement. Installed nicely and ensure no issues when clamping down the new CAC boots from Riff Raff.






