AFM sizing

[SSS]

Ok, when i get my hands on the piggyback ecu, i'm going to ditch the standard 2" (50mm) AFM on the sohc and replace it with:a) Z32 3" AFMORb) 3.5" Q45 AFM

Making way for the ITB's (50mm throttles) and higher compression (11.6:1) on the new motor at the end of the year, which one would be the go?

Opinions/Criticisms?

[SSS]

Also, keeping in mind that i already know how to wire the Z32 AFM up to the standard KA plug.