What size air horn to use?

[jmark]

TWM lists two air horns for the Japanese SU.

1 3/4" with

44 mm Air Entry 2700-4450 44 50 88 FR

1 3/4" with

48 mm Air Entry 2700-4850 48 50 88 FR

Which should I buy to pair with a pair of ITG air cleaners? MSA sells some too but I have heard they are smaller than stock air horns. I believe the MSA ones are by TWM as well.

http://www.twminduction.com/AirHorn/AirHorn-FR.html

[jmark]

Mods. please delete this thread.

[jackboxxx]

Mods. please delete the other thread.

but but I replied to the other one! dump this one