Such an approach may substantially raise {HEAD ~ the temperature} of the exhaust aftertreatment devices in an emission control device during non warmed exhaust conditions, leading to {TAIL ~ faster catalytic light} off 
leading to
Such an approach may substantially raise { HEAD ~ the temperature } of the exhaust aftertreatment devices in an emission control device during non warmed exhaust conditions , leading to { TAIL ~ faster catalytic light } off
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH