NOS Delco # 25518521
Made in Canada
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.