6 Z32 style fuel fail to plneum seals. These seals fit between the bottom of the fuel rail and the bosses in the lower intake plenum.
The larger diameter seals that fit the early style fuel rails and lower intake on 90-92 NA, 93 Convertible, and 90-94 Twin Turbo models.
The smaller diameter seals fit the late model fuel rails and lower plenums; 93+NA, 94+Convertible, and 95+ Twin Turbo models
We also offer a complete fuel injector o-ring set HERE.
Seals are available in OE spec Buna-N "nitrile" rubber or as an option below produced from Viton for increased resistance to deterioration so that they will outlast your car.