I have a Flowmaster 40 series Delta flow running on my 292. A single muffler with a 3 inch inlet and dual 2 1/4 inch outlets. Sounds very "un-six cylinder" like, in a deep tone sort of way. With the deep tone and dual pipes in the back, no one believes that I'm running a straight six.

But Turbos are much cheaper than Flowmaster and, from what I remember from a couple of decades ago, sound as low and mean as the Flows.

-magic mike-