That's the question. On my '09 I punched out the cat of factory headers but on the '12 I understand the only cats are in the end cans. My question is how much do you leave on the table with the stock headers and slipons? I like the lines of a dual exhaust so that's definitely the route I'm going.

The stocks still have cats in them. So the duals are a no brainer. Duals are low end grunty. Singles are built for top end.