Throttle Body Size
 

What are the dimensions (inner diameter) for a USDM and JDM integra type R throttle body? I know the JDM is tappered. Which one would work better with a skunk2 intake manifold?

b18c1 60
b18c spec R 62
b18a 58
b18b 60
b16a SiR 58
b16a Sir2 / b16a2 60
b16a3 58
b20b/z 60
f20c 62
d15b7 56
d16a6 55
d16y7 56
d16y8 56
d16z6 56
ZC 55
d16a1 55
d16a8 55
h22a / h23a 60
f22 / f23 60

Thanks!