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Originally Posted by Brolewigi
One of two things.
1.The hot exhaust gasses flowing through it from the engine.
2.From running a rich A/F.
It is not going to be cold.
Don't burn yourself...
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A rich A/F runs cooler than a lean A/F. how come you're saying a rich A/F is causing the heat? The only thing that heats up under rich conditions is a catalytic converter.