w/the headers I would havea 'port divider'. Doing so is not a performance increase, I did it for the gasket support & diversion of gases into the CI dual outs I have ona bronk (250/4.1). The pipes on a mild build 2v could be: the 2 hook ups to 1.75 inch, 2 resinator &/or 2 turbo muff, to the bumper. Ever C the H2O drip offa ex tail pipe? Lota moisture there. In a cold climate I'd go w/the hook ups inta a Y, one 2.25 inch pipe, 1 resinater &/or 1 muff, back to bumper to avoid rustin up ur system (less stuff to pay 4, maintain too) . I sometimes drill a tiny 'relief hole' at the lowest point to drain/make more durable. Am currently playin w/a very short system on the bronk. Nuttin wrked out yet but those R my additional thoughts...