Skunk2 Racing 349-05-1500 Alpha Series Radiator Incl. 1.1Bar S2 Radiator Cap 1.25 in. Inlet/Outlet Dual Core Design Aluminum Alpha Series Radiator 1988 - 1991 Honda Civic Hatchback (DX, Std) 1989 - 1991 Honda Civic Hatchback (Si) 1988 - 1991 Honda Civic Sedan (DX, LX) 1990 - 1991 Honda Civic Sedan (EX) 1988 - 1991 Honda CRX (DX, HF, Si) Dual-core design. Includes Skunk2 Radiator Cap. Features 1.25-inch inlet and outlet.