was just talking with the guy that has done exhaust work on my ram and another truck about doing duals on the wifes charger. he said he could do a y pipe and then two magnaflow's and tips for around $300-350. but not sure how its going to sound.
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2007 5.7 1500 4x4 qcsb k&n cai with aem dry filter, magnaflow dual inlet dual outlet, 6" fabtech lift, 20" gear alloy rims, 325/60r20 nitto terra grapplers. white truck club member #23. the pic in my avatar is my wifes car.
Do you want it to stay quiet or do you want noise?
I'll answer both ways.
If you want to keep the quiet, just have an exhaust shop fab something with 2 pipes after the muffler to come out the back. This way you get the look of the dual exhaust but still maintain the quiet touring effect from the 2.7. This would also be the cheapest way because you can have the exhaust guy use aluminum on the pipes, then get some nice stainless tips for show.
Now if you want more of a rumble out of the 2.7. Then yes remove the resos and install better flowing muffler. If you do this, then your exhaust guy will take care of getting a 1 in 2 out muffler so you will have the same sound out both sides. Pretty much the same as they would do on your Ram.