Posted by NOTNIP on 2/1/2017, 5:27 pm, in reply to "Carb heater"
That's the EFE heater. The purpose of the EFE heater is to aid with vaporization of fuel in cold conditions, as well as to reduce exhaust emissions by running for about two minutes to allow for leaner choke calibrations. I took mine off my '80 and couldn't believe the difference in power!
You'll need to replace the carburetor hold down studs with shorter ones, but that's easy.