{TAIL ~ Exhaust} flows from the turbocharger 18 through {HEAD ~ the DOC} 32 and the PF 34 
{ TAIL ~ Exhaust } flows from the turbocharger 18 through { HEAD ~ the DOC } 32 and the PF 34
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH