The exhaust system includes {HEAD ~ an exhaust manifold} 30, a diesel oxidation catalyst 32, and {TAIL ~ a particulate filter} 34 
The exhaust system includes { HEAD ~ an exhaust manifold } 30 , a diesel oxidation catalyst 32 , and { TAIL ~ a particulate filter } 34
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH