Muffler & exhaust suggestions?

[six8burban]

Ok I'm looking for something a tad bit louder than a stock escalade with a 6.0 engine? Basically I want a deap throaty sound only when I get on the throttle. So far I have headers and 2.5 collectors. Can I just run true duals with no h or x-pipe and is this good for the engine? Muffler type and offset, any suggestions? Pros and cons from having exhaust exit behind the rear wheels versus under rear bumber? oh and I will not be running cats.
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