I've been running an Jet Hot coated Genie single outlet header back to a transverse mounted Flowmaster for a few years. Don't remember the model #, but it's a single in, dual out style meant for a camaro. Really nice rumble all the way around, even though my 200 isn't cammed up or modified in any other way. I ran 2.25" tubes to the muffler and out the back. I love the sound!
I hate the clearance! Between the muffler & fuel line coming out of the tank it runs a bit close to the muffler, just over 1" of clearance. Now that I'm getting close to upgrading to an Offy 3x1, I wish I would've ran 2.5" tubing. But it doesn't matter because in the end, I will be switching to true duals just to ease my mind on the clearance issue.
Something to think about.