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