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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Reinforcing inserts
All I can saw is WOW everything I purchased was of the highest quality, everything fit perfect and the directions were outstanding. This will be my go to place for advice and parts in the future
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great idea
What a great idea, and was need as mine were pretty bent. The most important to me - MADE IN THE USA! Such a rare thing anymore, and I am happy to support and American made product.
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Geat!
Fit perfect. Easy install. Fixed a boost leak and was able to clamp down super hard on the plenums.
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Great fit
These inserts are a great upgrade in you’re replacing your boots. Cheap insurance policy on a knuckle torque wrench tightening clamps. Thanks Riff Raff!
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Plenum inserts
Really liked this product, my plemnums had some slight bending before inserted. Make it to where you could put some torque on clamps now.
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Reinforcing plenum inserts
The fit and finish are five stars. Worth every penny. Thanks riffraff for a great product.
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Fast and Inexpensive Solution
These were a great find, and saved my from having to remove my plenums since the old owner bent them up badly. These new billet inserts were simple to install, and straightened my mangled plenums right up. No more boost leaks. Very happy with this ingenious little product.
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Great investment
Nice quality units at a great price (compared to replacing the plenums). Install was easy (my plenum holes were a bit out of round) and it FIXED my &$#@ boost leak(s)! I did replace the boots as well, just to make sure. Highly recommended if you have boost leaks.
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RDP Plenum Reinforcing Inserts 99.5-03
We put these in while replacing the Complete CAC Boot kit also from Riff Raff. We could not find any installation videos. These need to be gently encouraged with a rubber mallet down inside the factory plenum. Perfect fit!






