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