Diameter of Air Intake

[edgeydt50]

Does anybody know what the diameter is of the standard pipe work to the air box is? i would go and measure but i dont have my car to hand!!!
I know the samco is 70mm but is this the standard width?
Cheers
Chris

 

[ben_p]

70mm fits

 

[edgeydt50]

Cheers, much appreciated