Having problems with your 2001 Ford Expedition ?

What should be hotter post catalyst or pre catalyst on automotive application

Posted / edited by AnonymousUser on : 18-06-2018

Answers :

Easy answer... closer to engine, hotter the exhaust.
\015\012So, before will be hotter than after... but it may take some time to heat up the fatter exhaust header - because it may be a thicker metal.
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