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Fragola Performance Systems manufactures high performance carb fuel line kits for most popular carburetors. Each kit comes completely assembled with a high flow adapter, an EZ system of detachment for quick jet changes. These Pro Stock Fuel Line Kits do not have a provision for the fuel pressure gauge.This dual inlet Holley fuel line for the 4500 HP Carburetors features a crimped PTFE-line stainless braided hose assembly and your choice of black or blue fittings.Fragola Pro Stock Fuel Line Kit for Dual Inlet Holley 4500 Carburetors: