ecu flash dyno tune

Dear experts and experienced fellow S10’ers… Does it make any sense to get my ECU flashed and still keep the original headers and exhaust?… Could not find conclusive info or advise in the forum (or I am not much of a rearcher, for which I apologise) Thanks in advance… MileageMonster…

I have a 2014 ES with ECU dyno tune/flash, Arrow header, modified oem muffler (larger tailpipe with oem spark arrestor assembly removed, screen re-attached), Uni-Filter NU 6235 dual stage air filter & heat tape wrapped air box. ECU flash is the single most beneficial & impactful engine mod for...