If you get the fel-pro 'plenum gasket' it will come with the yellow o-rings. If you get a gasket from the dealer, you must also purchase the o-rings seperately. Do not re-use yours if they're over 6 months or so. It'* not worth trashing your engine with coolant. It'll kill your rod bearings.
Don't buy the viton seal for a supercharger over 100k miles. The input shaft has been worn by the OEM seal and has left a small groove. This is normal, but the 'stiffer' viton has a hard time breaking in to that groove, and your nosedrive may leak oil for a month or two until it seats.
Get the nitrile seal. M90 and M62 bearings, seals, and coupler are all the same.