Main Jet Extension 1969-pontiac-grand-prix-esi1241202 They are precision machined from

They are precision machined from 6061-T6 billet aluminum for strength and durability and feature a black bright dip anodized body and a clear bright dip anodized top for corrosion resistance and good looks

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Main Jet Extension 1969-pontiac-grand-prix-esi1241202 They are precision machined fromAn improved jet extension design that actually screws into the metering block. The main metering jet then threads into the end of the extension. The installation effectively moves the fuel entry point for the main jet out into the fuel bowl. In this location it cannot be uncovered by fuel, causing a lean condition, during periods of hard acceleration or braking. 2 Pkg.