Thanks for the help

 

62mm

 

and definetely a big diff from a gsr

 

i thought the gsr was 62 and the itr was 65?

 

no itr is 62. gsr is 59

 

gsr is 60

Honda Throttle Body Sizing Chart

Inside Diameters (in mm)

* d15b7 - 56
* d16a6 - 55
* d16y7 - 56
* d16y8 - 56
* d16z6 - 56
* ZC - 55
* d16a1 - 55
* d16a8 - 55
* b18c1 - 60
* b18c5 - 62
* b18a - 58
* b18b - 60
* b16a SiR - 58
* b16a Sir2 - 60
* b16a2 - 60
* b16a3 - 60
* b20b - 60
* b20z - 60
* h22a - 60
* h23a - 60
* f20c - 62
* f22 - 60
* f23 - 60