I need help with the size of turbos. I see measurements like 20g, but I'm not familiar with this system or any for that matter. If anyone could give me a link that can help me out it would be greatly appreciated.

http://www.automotiveforums.com/vbulletin/showthread.php?t=201348

That should help out a little. 20g is just the name of a certian model. There can be different size 20g's. It is also a way to tell the manufacturer.

14B
16B
20G
Those are Mitsubishi turbos
T25
T3
T04B
T04E
Those are Garrett or Airesearch turbochargers.

You see?

Yeah I do, thanks.