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Holley Main Jet Extensions 122-5000

Original Price:


Sale Price:


Jet Extensions, All Demon Carburetors, Holley 4150/4160/4500, Screw-In, Pair

Estimated Ship Date: Monday 12/22/2014 Would you rather pick it up? Select Location

  • Warning! Hurry sale prices won’t last long so take advantage of these Summit Racing Equipment values now!

Brand: Holley

Manufacturer's Part Number: 122-5000

Part Type: Carburetor Jet Extensions

Product Line: Holley Main Jet Extensions

Summit Racing Part Number: HLY-122-5000

UPC: 090127336779

Jet Extension Style: Screw-in

Jet Extension Thread Size (in): 1/4-32 in.

Jet Extension Material: Brass

Fuel Bowl Gasket Included: No

Float Included: No

Quantity: Sold as a pair.

In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

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.


Most Helpful Reviews Review this Product

1 Customer Reviews for Holley 122-5000 - Holley Main Jet Extensions

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Good quality, be aware of fitment issues

Summit RacingSummit Racing Verified Purchase

Good quality, couldn't use them because of my float hitting them even without the jets installed, maybe I need to do more research.

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Reviewer: ED from AR

Date: October 28, 2014

Ease of Installation

Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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