exhaust modification

got a question for the 04 GTO owners. I have an 04 GTO M6, but as we all know i have the single exhaust exit on the rear bumper. I was going to go with a Magnaflow cat-back system but i want to put a second exhaust exit on the right side of the bumper which shouldn't be a problem with professional work,but would i have to buy a 05 GTO magnaflow exhaust system or can the 04 Magnaflow exhaust system be refabricated to come out of the dual exhaust exit on the car? what do you guys suggest i do? i really can't stand to see that single exhaust outlet on the car, but i'm not about to trade it in for an 05...

no ideas? or has this been posted before? If so where could i find it.