No disrespect, but you should know this stuff as an IR holder.
You just require the equipment for your chosen route that meets the BRNAV capability. In this day and age it means an IFR GPS, DME and the kit for whatever your let down is going to be along with a MODE S. My G Reg Cessna uses a G430 GPS, G330 for transponder, a DME and and an ADF. Garmin is connected to the HSI.
The database needs to be within 28 day AIRAC cycle.
Otherwise that's about it.