Is it worth it..., Magnaflow? Options

[urbandork]

Im slowly thinking about putting a magna flow muffler on my 6th gen. But im wondering is it worth it? Im wondering more about sound then performance but both do matter.

How much diffrence in noise does it make? How much deeper is it?

Also i have a GT if i go for a 2.5 over a 2.25 is there an adapter that i can use to keep the stock piping or would i have to get 2.5 piping all the way from the down pipe and back?

Whats the stock size for GT piping n e one know?

Ive search the forum and found that when it comes to muffler suggestions its the magnaflow or flowmaster. Ive been told that magnaflows are better. Is this true or a simple bias?

[DustyBurns30]

you would have to hook up all your oil lines when they're done so you don't burn up the turbo, and it would probably be a good idea to have the intake side of the turbo filtered. i think you would be better off to just install everything ahead of time and tow it to the exhaust shop.