Wide Open Design fuel system parts are selected for building reliable EFI fuel systems in LS swaps, rock crawlers, buggies, race vehicles, and custom off-road applications. Shop complete fuel plumbing kits, inline fuel pumps, filters, regulators, AN fittings, shutoff valves, mounting components, and replacement parts for building or servicing your fuel delivery system.
A properly designed fuel system has to deliver consistent fuel pressure and volume while protecting the pump and injectors from contamination. Pump flow, fuel line size, pre- and post-pump filtration, regulator configuration, electrical supply, and return or returnless plumbing all need to work together. Matching these components to the engine's fuel demand helps create a system that remains reliable under the vibration, heat, steep angles, and sustained loads common in off-road vehicles.
| Component | What It Does | What Matters Most |
|---|---|---|
| Fuel Pump | Supplies pressurized fuel to the engine | Flow, pressure, fuel compatibility and electrical supply |
| Pre-Pump Filter | Protects the pump from larger contaminants | Micron rating, flow capacity and placement |
| Post-Pump Filter | Protects injectors from fine contaminants | Micron rating and EFI compatibility |
| Fuel Pressure Regulator | Controls fuel pressure supplied to the engine | EFI pressure requirements and plumbing configuration |
| Fuel Line / Hose | Carries fuel through the system | AN size, fuel compatibility, pressure rating and routing |
| AN Fittings | Connect hoses, pumps, filters and other components | Correct size, thread type and routing |
| Fuel Shutoff Valve | Allows the tank to be isolated during service | Flow capacity, accessibility and fuel compatibility |
| Pump Mount | Secures the external fuel pump | Vibration isolation, location and service access |