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Mr. Gasket

Mr. Gasket Phenolic Carburetor Spacer Kit - 1 Inch - 4 Hole Center

Fits Quadrajet 4-Barrel Carburetors

Part # 3406 Be the first to write a review
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This 1 inch tall phenolic thermoset plastic spacer insulates your carburetor against manifold heat keeping it cooler and helps prevent fuel percolation (also known as vapor lock) in hot weather. This can also allow for a denser fuel mixure to help increase performance in some applications, as well as provide additional plenum volume. 4-hole design is design for GM (General Motors) Quadrajet 4-barrel carbs and may also work with other spreadbore design carburetors. Gaskets, studs, washers and nuts are included.


  • Phenolic Thermoset plastic insulates against manifold heat
  • Keeps fuel cooler to reduce vapor lock & increase charge density
  • 1" height increases plenum volume
  • May increase performance in some applications
  • Gasket & installation hardware included

About Mr. Gasket

Using his own '57 Chevy as a rolling testbed, drag racer Joe Hrudka launched the most famous gasket company in the world more than half a century ago. Mr. Gasket is the go-to gasket source for racers with gaskets and fasteners that seal perfectly every time.

Brand Mr. Gasket
Emission Code5
Product TypeCarburetor Spacer
WarrantyLimited 90 Day
Part Number3406

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Limited 90 Day: See Details

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