That must be it because I know a had a 2" coupling fitting on mine and I also measured it (can't remember exact measurement, but closer to 2" than 3").
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15