94.5-98.5 7.3L CNC Fab 2" 10 Bolt Billet Intake Plenums - 42300X

These CNC Fabricatin, LLC billet intake plenums are a nice upgrade over the stock flimsy stamped sheet metal and will not deform the center inlet...
Vendor: CNC Fabrication
SKU: 423004
Availability: Many In Stock
Product Type: Intake Plenums
Please hurry! Only -2 left in stock
Select Intake Plenum Color: Raw - 423004
Subtotal: $399.95
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Return Policy

Within 21 Days

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Cancer and Reproductive Harm

These CNC Fabricatin, LLC billet intake plenums are a nice upgrade over the stock flimsy stamped sheet metal and will not deform the center inlet port when installing your CAC boot clamps.


  • High strength 6061-T6511 aircraft aluminum
  • Bolt/nut kit included
  • Tube of Permatex Ultra Gray RTV sealant included
  • Will work with all aftermarket HPOP line kit fittings
  • CNC machined in-house
  • High Grade Powder coated
  • Will work with all aftermarket fuel line kits
  • Thicker wall for higher boost applications
  • Made in the USA

**If you are going to a T4 setup with an OBS or E99 truck you will want this set of PLENUMS instead. 


After removal of the old plenums, make sure the surface of the head and new plenum is absolutely clean of any dirt, debris, previous RTV sealant or the new plenums may not seal properly.  Apply a small bead of sealant around the outside flange following the groove and go around each bolt hole.  Do not apply too much sealant to avoid large globs getting into the intake runners of the cylinder head after the sealant has cured. Follow the instructions on the back of the tube of sealant.  After you have placed the sealant on a plenum, install it on the head slowing by watching the bolt holes to line them up as best you can.  Install each bolt finger tight.  If you are using the original mount for the GPR there are nuts included to better match the bolts in the kit. After each bolt has been installed finger tight, start in the center of the plenum and work towards the ends tightening the bolts with a wrench.  3/8" ratchet with a 13mm shallow socket and 4" extension works great for all bolts except the one on the passenger side at the front of the engine (you'll need at 13mm combination wrench) that cannot be removed unless you either pull the front cover or have the head off the engine.  **You will not be able to install one of the provided bolts in this location unless the front cover is off or you have the head off, the factory bolt can be reused without issue. This one bolt must be installed prior to engine assembly.  Bolts are to be torqued to 20ft/lbs.

NOTICE:  In most cases the 94.5-95 model year engines have 8 bolt holes vs 10 bolt holes in all the rest of the years.  We have an 8 bolt variant for these heads HERE. For OBS plenums one is drilled and tapped to be able to attach your MAP sensor to the stock location, there is a plug and hose barb included.

If you are unsure of installing yourself, seek out a competent and qualified technician to install this kit.


Brand: CNC FabricationManufacturer Part Number: 423004, 423005, 423006, 423007Length (in): 4.0Width (in): 19.0Height (in): 4.0Weight (lbs): 5.0

Returns Policy

You may return most new, unopened items within 21 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


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