EFE Carburetor Heater Gasket - Rochester Quadrajet
Our Part # 5309

Fits:

NOS Delco # 25518521
Made in Canada
Quantity: 1

Specifications:
Overall depth including heater element: 1.14"
Gasket/spacer thickness: .270"

Rare, Very limited quantities available.
The EFE (Early Fuel Evaporation) heaters purpose is to aid with vaporization of fuel in cold conditions, reduces emissions. A malfunctioning EFE heater will cause poor driveability and reduced fuel economy.
The EFE heater is located between carburetor and intake manifold.