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Holley 122-5000 - Holley Main Jet Extensions

  • Jet Extensions, All Demon Carburetors, Holley 4150/4160/4500, Screw-In, Pair
  • Application Specific
  • Estimated Ship Date: 5/29/2012
 
BrandHolley
Manufacturer's Part Number122-5000
Part TypeCarburetor Jet Extensions
Product LineHolley Main Jet Extensions
Summit Racing Part NumberHLY-122-5000
UPC090127336779
 
Jet Extension StyleScrew-in
Jet Extension Thread Size (in)1/4-32 in.
Jet Extension MaterialBrass
Fuel Bowl Gasket IncludedNo
Float IncludedNo
QuantitySold as a pair.
 

These Holley main jet extensions feature a new design that actually screws into the metering block. The main metering jet threads into the end of the extension, moving the fuel entry point for the main jet out into the fuel bowl. When it's in this location, it cannot be uncovered preventing a lean condition during periods of extreme acceleration or braking.

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