PN Reference:
'98-01 None-R: 04711-ST7-A91ZZ
'98-01 ITR: 04711-ST7-A80ZZ (discontinued)
History: Credit to RBoosted717 for this information
Honda of Europe played a large role in developing many of the ITR features added by the '97-01 ITR. This was driven by the race teams in Europe providing requests of feedback. Many may recall the golden era racing, BMW E30 M3's, Mercedes 190E's, and later, our cars. European racing consisted of longer endurance racing. This added more needs like better headlights, bigger brakes, bigger hub/bearings for better temperature control, and a foglight design that met FIA regulations for brake duct use.
The results were a fog light design that met FIA specs to be used as brake duct for European race teams.
OEM Foglight:

Photo credit: integratyper.org
European Race Example:

Photo credit: RBoosted717's Belgian Pro Car Restoration Thread