Integra OEM intake size?

[99ExCoupe]

Does anyone know the stock integra OEM pipe diameter? My friend is going to get a Filter for it...would anyone know what size the pipe/flange is?
thanks!

 

[knockoff]

use a measuring tape..... :

 

[Declectic]

if your just going to drop a filter, all filters are pretty much the same size so... yeah... have your friend check out honda-acura.net or teamintegra.com

i think he'll find more answers there...