96 Ram 4x4??

single exhaust is cheaper.. I have $250 into my single exhaust.. dynomax pipes and a Magnaflow muffler all from Summit.. mandrel bent.. it's all you need in a tow vehicle/daily driver and the spare tire can still stay under the bed

the Mopar Perf. ECU's are not only hard to find cause they need to be year/eng/trans/ specific a tuner is a better idea and you'll see more power, and be able to check/clear codes as well as change the speedo for different tires heights I paid $150 shipped for mine used

FYI I paid $1000 for my Durango and put $1500 into it so far..