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290 Posts
Lots of Camaros used a single muffler with dual outlets. My 454 pickup uses a single muffler but with both dual in and dual out! Best case would be a true dual setup with an x or h pipe crossover. If the SS is like my 3.9 then the down pipes merge into one cat and then split again into 2 mufflers. Might as well stay with one pipe to one muffler and then dual out saving $100 on another muffler.