Part Number: 11-1120 Manufacturer: Sifton UOM: 1 - EA Summary:Sifton nitrate exhaust valve for Big Twin models. Fitment: FL 1948-1984 FX 1971-1984 FL 1979-1983 FXR 1982-1983 Tech. Notes:11-0614 - Nitrate Steel Exhaust ValveCountry of Origin: USA