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Best Fuel Governor Diaphragms - Buying Guide

Last Updated: 10/18/2019

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Holley 20-85 Cover-Diaphragm Housing

Model: 20-85   |    Mpn: 2085   |    Ean: 0090127108123   |    PartNumber: 2085   |   Asin: B000E0C6Y4

The Holley cover diaphragm housing is designed to balance secondary operations on a 1x4 barrel application.


  • Metal cover for a 4-barrel for durability and protection
  • Meets or exceeds manufacturer's specifications
  • 90-day limited warranty
  • See more on Amazon...

Brand: Holley   |   Manufacturer: Holley

Package Dimensions: 1.6 x 3.9 x 6.1 inches (4.1 x 9.9 x 15.5 cm)

First Available: 2006-11-29

Amazon Price: $9.89 | as of 10/18/2019(5:54am pst)
Availibility: Usually ships in 3-4 business days
List Price: $9.33

Warranty: 90 Days

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