I would check with the V6 guys and see what they did about the catalytic converters. Many 6'ers have the dual setup. The V6 CPU wasn't programmed to have true duals so I would guess you would also need a tune. V6 or Gt the 2010's look good, congrats. Warranty wise, is you do experience some type of failure, your exhaust setup must be proven as the source of the failure by a dealership for a warranty to be void. I'm no engineer, but going with duals might net you a noticable loss of torque.