50 trim intake size?

[Church]

I have an agp 50 trim full garrett turbo kit on the way and would like to have everything else when it gets here. Im not sure what size intake pipe i need for this turbo. I looked around and saw some people using 3" and some using 3.5". So what size is it?

 

[92awddsm]

Most have a 3" inlet so a 3" intake pipe will work fine.