{HEAD ~ Hot exhaust gas} from the by pass port which is directed at {TAIL ~ the burn off converter} for converter light off flows primarily through the central portion of the converter, with the result that the converter is unevenly heated 
{ HEAD ~ Hot exhaust gas } from the by pass port which is directed at { TAIL ~ the burn off converter } for converter light off flows primarily through the central portion of the converter , with the result that the converter is unevenly heated
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH