Best pipe size for air feed to 172 airbox?

[davebem]

Im replacing the 2 air feeds to my 172mk1 airbox, whats the best pipe size to get? Someone posted a pic a while ago of custom air feeds going to the box that were bigger, does anyone know who it was?

Cheers in advance.

 

[franx]

more air means more power

that's the one , search m8

 

[len_beach]

It's either 63 or 70mm, I can't remember which LOL