What size "mm" is this?

[fox_body]

I was wondering how to find the size of my TB and spacer. It's an Accufab and the only numbers I found were located inside the EGR spacer #E7ZE-9H474c-AC does this help??.....Anybody

 

[jtfairlane]

The EGR spacer part # you gave is for a Ford Racing 65mm (with 67mm opening) EGR spacer. It is not the part # of the spacer, but the casting number for Ford Racing part # M-9474-A50. I imagine the Accufab throttle body you have matches the spacer, so it should be 65mm. If you want to be sure, simply measure it.

 

[Mustang5L5]

Just measure the inside of the hole on the backside of the throttle body as close as you can get it.

Then go to google and type

XX.X in to mm

and it will convert to MM for you