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