Holley 350/500 to Weber Manifold Adapter + Spacer Kit

LCE Kit

Holley 350/500 to Weber Manifold Adapter + Spacer Kit

SKU: 1033042
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$139.20
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Holley 350/500 to Weber Manifold

(Adapter + Spacer Kit)

We manufacture these billet aluminum carb spacers in house, to our specs. We use only the finest materials in our spacers to assure the quality you would expect from LC Engineering. These are CNC machined out of a solid piece of billet aluminum. These are not a one-size-fits-all spacer like some others on the market. Ours are designed to fit a specific carburetor and intake manifold to allow perfect fitment.

Carb spacers work by increasing the plenum size and offering a smooth transition from the carburetor to the intake manifold. This adapter allows you to use a Holley 350 2-barrel carb to your Weber flanged race-prepped intake. What is race-prepped, it where the EGR has been removed and welded. Don't have a race-prepped manifold, No Problem use the 1" phenolic spacer and the valve cover studs listed below and it will allow enough room for the linkage to work. You will need to block the ERG though. Spacers come with gaskets and hardware for a trouble-free install. This spacer is 3/8" thick. For optimum performance, blending is required, call tech support for more information.




Note: Images are for illustration purposes only. Images may not represent the product listed. Please contact customer service with any questions or concerns: 1-928-505-2501.

  • Weber Manifold Pattern

To open a printable PDF version of this instruction CLICK HERE



  1. Disconnecting battery and set emergency brake.

  2. Remove air cleaner assembly.

  3. Remove carburetor and clean gasket surfaces. Do not allow debris to enter the intake plenum! Insert a shop rag or towel to keep debris from falling into the intake. Be sure to remove rag before installing adapter!

  4. Place Weber 32/36 Base Gasket onto the manifold. See Illustration (E)

  5. Install Holley 500 to Weber Manifold Adapter onto the intake manifold utilizing the 4 Flat Socket Cap Screws provided. Use a small amount of thread locking compound to prevent the screws from backing out. See Illustration (B)

  6. Install the (4) M8-1.25 X 65 MM Studs with the short end into the adapter (Down) utilizing thread locking compound on these as well.

  7. Place Holley 500 Base Gasket on now. See Illustration (C)

  8. Place Holley 500 Phenolic pacer over studs. See Illustration (A)

  9. Place Holley 500 Base Gasket on now. See Illustration (D)

  10. Place Holley Carb on now.

  11. Place (1) M8 Flat Washer and (1) M8-1.25 Nylock Nut on each of the four studs to secure the carburetor. Do not over torque, it will create carburetor base damage!

  12. Reconnect all vacuum lines, fuel lines, and linkages that may have been removed.

  13. Install air cleaner.

  14. Reconnect battery, start engine, check for fuel and vacuum leaks.





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1 Review Hide Reviews Show Reviews

  • 0
    5
    Great fit

    Posted by David Tomasello on Nov 20th 2023

    This is just what I've been looking for. The fit was perfect.

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