Downpipe/Exhaust adapter question

[Snacks]

I'm looking to buy a downpipe for my ecoboost with an active exhaust, but Im not sure if I need the standard 2.25" connection, or the 3" connection. Does anyone know what the diameter of the active exhaust is?

Sponsored

 

[ihasnostang]

just did the cvf downpipe on my active exhaust. used the 2.25 adapter