Pipe size for Hybrid 1-2 uz with M112 ?

[vsh150]

I all , i made my 1uz vvti with a 2uz long block , and soon want mount an m112 SC , my question is for the best configuration on exhaust.
Previously a have a non vvti 1 uz with dual 2" Y pipe and single 2.5" with magnaflow turbo xl muffler, good sound and performance . Now I have the option to repeat de formula or put dual 2.5 from stock manifold , Y pipe and a single 3" to the end. Opinions?

Salutes

 

[George_R]

Don't use chambered mufflers with force induction. Duals all the way to the back would be the best option. x-pipe is better to be there, too

 

[vsh150]

Don't use chambered mufflers with force induction. Duals all the way to the back would be the best option. x-pipe is better to be there, too

Thnks George , what about pipe size?

 

[George_R]

twin 2.5" should be more than adequate for under 400hp