Intercooler pipes size

[baza]

I have a gsr with a 4g63 I'm about to bolt a gt35/82 , s90 throttle body and after market inlet mani I'm just if anyone has this if so what size intercooler pipes 3" or 2.5" should I get and best place to get them I'm in sydney
Thanks Dave

 

[bazeng]

2.5 turbo to cooler
2.5 to 2.75 to tb

Basically match the TB size on the cold side, no point going bigger.

 

[JayRome]

https://www.plazmaman.com/shop_index.php

2.5" hot and cold side seems to be ideal..
2" hot side (or turbo outlet matched size) and 2.5" cold side is a responsive set up

 

[DOUGMO]

I run 2.5" cold side and 3" hot side...just sayin