Honestly, if you want the sound of the stock setup I'd see if I could find someone who has one in good shape and wants to trade. Also a dual outlet muffler will be a little quieter than a single outlet... but it's not enough to split hairs over in my opinion.
You could also look into getting something put together using the components from a similar vehicle's stock exhaust... any other 3 liter n/a engine.
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