Duel exhuast?

[Tommio RS]

OK. I just scored a Smurfin great deal on some exhaust pieces. I Got a 3"LSP WRX Catback with hangers and muffler for free! And for $200 bucks a COBB 3" downpipe! I Love working at a Subaru Dealership!!

Now seeing that i just saved my self some cash I thinking that I'm going to try to make a Duel exhaust turbo back. I'm thinking i can go single pipe all the way until the rear axle area, then use a Y pipe to split the piping into 2. Then use some good old pipe manipulation to duel it.

And yes i know one side of the bumper will have the indent for the exhaust and one will not. And how much would this cost around for a muffler shop to weld all the extra piping in?

Thanks for reading!