The oxidation catalytic converter is arranged upstream of {HEAD ~ the exhaust gas particulate filter} in {TAIL ~ the exhaust passage} 
in
The oxidation catalytic converter is arranged upstream of { HEAD ~ the exhaust gas particulate filter } in { TAIL ~ the exhaust passage }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL