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Holley EFI

Holley EFI Vacuum Manifold

The Holley EFI Vacuum Manifold is an excellent vacuum or boost reference source.

Part # 534-52
Estimated shipping date: 10/29/2021
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The Holley EFI Vacuum Manifold kit is designed for those of you wanting a simple and clean solution for plumbing either vacuum or boost referenced sources. This manifold block features 12 1/8th NPT ports that can be plumbed with most common EFI transducers such as the Holley 554-102 0-100 psi transducer. It also features 2x -6 O-ring boss AN Ports, ensuring your manifold block has an excellent vacuum or boost reference source. Improve your engine bay organization by mounting all of your common pressure sources in one easy to access location!


  • Compatible with all transducers that utilize 1/8 NPT male threads and 7/8” or smaller body/hex diameter
  • 12 independent 1/8 NPT ports
  • 2 -6 ORB Ports
  • Improve engine bay organization by mounting transducers and/or vacuum lines all in one easy to reach location
  • Ideal for engines that require multiple vacuum/boost reference sources
  • 4 mounting holes designed for the use of 5/16” socket head cap hardware for secure and robust mounting
  • Crafted from 6061 Aluminum
  • Anodized black for durability and laser etched with the Holley EFI logo

About Holley EFI

Holley is the new standard in EFI! Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever!

BrandHolley EFI
Inlet1/8 NPT
Inlet / Outlet Size9/16-18 Female O-Ring (AN 6)
Material6061 Aluminum
Product TypeSensor Block
Part Number534-52

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