Fuel Line 4150 Ultra XP -8 an Swivel Seal Fuel Line Kit HolleySwivel Seal billet single feed fuel line kit that fits 4150 Ultra Xp Model carburetors with 8 An male inlet fittings and Xp fuel bowls with a 9. 75 inch Center to Center on the fuel inlets. Features and Benefits: Braided Stainless Steel Line Rugged Billet Construction An fittings Red and Blue Anodized For Holley 4150 Xp Carburetors Details: Adjustable: No Center to Center Measurement: 9. 75 Inch End 1 Gender: Male End 2 Gender: Female Finish: Blue