1986 Subaru GL Coupe 1.8L H4 GAS;. 1985-1986 Subaru GL Sedan 1.8L H4 GAS;. 1985-1986 Subaru GL Wagon 1.8L H4 GAS;. OE Equivalent Fuel Tank Cap;. Fuel Tank Cap;. Gates - Driven By Possibility. Two-way action pressure relief/vacuum relief valve allows fuel tank to ?.