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
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.