Riffraff Diesel 2" Billet Intake Manifold Plenums 94-Early 99

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Riffraff Diesel Billet Intake Manifold Plenums for Ford 7.3L 1994-Early 1999

Our Patent Pending Gen 3 billet aluminum intake manifold plenums are 100% made in the USA from USA materials.

An engineered design that addresses several issues at once: 
- Pair of 6061 Billet Aluminum Plenums - No more sheet metal to bend
- Anodized Black and available in custom colors upon request
- Stainless Steel countersunk mounting hardware for seamless install
- Viton O-ring seal rather than RTV and tested at over 150psi
- Works with both dual and single HPOP's
- Billet spacers for GPR and GPCM brackets
- Plenum mouth O.D. is machined to retain intake "Y" better for T4 style kits

If you are looking for a true billet solution at an economical price, then this is your product.

*Specifically made with a 2" inlet for 1994 to Early 1999 7.3L running a stock style turbo, KC Turbo or other pedestal mounted turbo. 1994-1996 have 8 mounting bolts, and 1997-2003 have 10 mounting bolts. Make sure you check to make sure you have selected the correct ones after checking your vehicle. Provision for the AIH ground, and passenger side fuel line clamp has not been made in this kit as normally they have already been deleted. 


*Note: Anodized Color on Aluminum can be discolored / damaged by chemical engine cleaners. Use only soap and water to clean.

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  • 5
    RiffRaff Diesel 2” Billet Intake Manifold Plenums 94-Early 99

    Posted by C Smith on Nov 20th 2022

    As stated on another review, I’d been researching improvements for quite some time….. After waiting for so long to pull the trigger on some billet plenums from RiffRaff Diesel, the 94-97 plenums were out of stock. My factory sheet metal plenums had been leaking oil for a very long time and I had read about the Viton O-ring seal vs the gray silicone. The RH intake had been leaking for as long as I can remember, so the silicone wasn’t all that good to start with. I had sent them a very long 1st contact about my old high mileage truck checking on availability and Clay stated to order them for an Early 99 and that they were the same as my 97. He was absolutely correct, they were identical. His plenums fit like a glove, they are a work of art. I chose red to match the boost tubes in the Banks IC kit for a change from black everything under the hood. Applied some tacky grease, then wiped up excess and the O-rings did fine. The stainless hardware is very nice as well. Just make sure your 5 mm Allen socket is in good condition, the 6 mm Allen worked good too. The Ford WSM states 18 ft lbs, hardware will hold it, but backed them off to 17 ft lbs without any problems. It was very easy to clean old silicone off heads and with the o-rings, it was a clean job !
    Just make sure when you torque them down, just go slow, you’re not torquing head bolts. Work from the center and work your way out. The bolts for shallow holes use 5 mm, the longer bolts 6 mm.
    Everything ordered had to be done at the same time.starting with these plenums. The passenger side front fuel fitting needs a 45 degree added with some soft set pipe sealant and you’re good to go .
    They really look nice !
    I’ll be ready for some more RiffRaff bling when I get my CC bill paid down from my long awaited improvements…….. shipping very fast, nothing damaged.
    Thanks Clay for all your help !

  • 5

    Posted by Samantha on Oct 21st 2022

    Just phenomenal will be ordering another set soon

  • 5
    Amazing Product

    Posted by James on Aug 8th 2022

    Very hard to describe just how great these are. The machining, fit, finish and seal is better than anything out there. They even include stainless steel hardware. Direct fit for my OBS and even worked great with my KC Turbo upgrade.

  • 5
    Billet Intake Manifold Plenums

    Posted by Justen Johnson on Jun 15th 2022

    Quality product! Excellent machining and a perfect fit! Replaces those flimsy plenums with a 100٪ Made in America quality piece of craftsmanship!

  • 5

    Posted by John Davis on May 25th 2022

    Awesome product would recommend this to anyone looking for intake plentums

  • 5
    95 7.3 OBS billet intake plenum 8 bolt

    Posted by Tim Creech on Feb 12th 2022

    Fit like a glove. Extremely great quality, hardware is good. Oring had hard time staying in groove at first. Light layer of grease around oring and stayed in the groove no problem. They look nice!

  • 5
    Early 1999 billet plenums

    Posted by Jason Walp on Jan 10th 2022

    I bought these for my friend who has an early 1999 Extend cab 4x4. We haven't put them on yet, but I have to say, they are absolutely beautiful and I am certain the fit is going to be better than the factory pieces. It really is too bad they are so low and will be mostly covered up with all the inter cooler tubes, intake piping, and wiring harness once installed, because they are a work of art.

  • 5
    Billet Plenum

    Posted by Ed Cramer on Sep 29th 2021

    I will say these are such a work of engineering and the pictures don't really do them justice. Installed a set on my 1996 7.3 to replace the stockers and what a difference. Stainless hardware is a real nice addition as well. No more leaks, I am happy.