The exhaust system may also have a controller configured to selectively control an amount of {TAIL ~ fuel} injected by {HEAD ~ each} of the plurality of dosers based on a velocity of the exhaust adjacent to each doser 
The exhaust system may also have a controller configured to selectively control an amount of { TAIL ~ fuel } injected by { HEAD ~ each } of the plurality of dosers based on a velocity of the exhaust adjacent to each doser
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH