Fuel Lines, AN Kits, EFI Hose & Hard Lines for Performance

What Fuel Lines Do

Move fuel safely and consistently

Fuel lines connect the tank, pump, filter, rails, regulator and engine. The right hose or hard line supports dependable delivery while resisting fuel exposure, pressure, heat and vibration.

EFI Hose and Fuel Pressure

Use hose rated for the system

Fuel injected vehicles require hose rated for EFI pressure and modern fuel blends. Read the listed pressure rating and fuel compatibility before using universal hose in a custom or replacement installation.

AN Lines and Adapters

Build a serviceable fuel path

AN fittings and adapters are useful for custom fuel rails, regulators and pumps. Match the thread, hose size, sealing method and fuel system layout so every connection works together.

Vehicle Specific Fuel Lines

Confirm the factory connection points

Direct fit fuel rail line kits and feed lines are designed around the listed engine and chassis. Subaru WRX STI and Infiniti Q50 Q60 applications require the correct year range and factory fuel system configuration.

Hard Line, Fill Hose and Vent Parts

Repair every section of the system

Fuel system service can involve supply line, return line, filler hose and tank vent components. Inspect the complete route for cracks, corrosion, rubbing and loose connections before replacing only one part.

Installation and Safety

Prevent leaks before driving

Route fuel lines away from exhaust heat, moving suspension and sharp edges. Use approved clamps and fittings, then pressure test the system and check carefully for leaks before starting or driving the vehicle.

Top Fuel Line Brands and Product Types

• Gates. Fuel injection hose, repair line and filler hose for service work
• Cobb. Subaru WRX STI fuel rail line kits and AN adapters
• AMS Performance. Infiniti Q50 and Q60 low pressure fuel feed lines
• Titan Fuel Tanks. Tank vent and fast fill components for truck fuel systems
• Nitrous Express. Fuel rail adapters for performance fuel delivery
• Aeromotive. AN hose and fittings for custom high performance fuel systems
• Radium Engineering. Fuel system parts for EFI and motorsport builds
• Fuel injection hose. Pressure rated line for compatible EFI repair and routing
• Hard line repair sections. Replacement line components for factory style service
• AN adapters. Fittings for rails, lines, regulators and custom fuel plumbing

How to Choose the Correct Fuel Line

• Confirm year, make, model, trim, engine and drivetrain for direct fit lines
• Verify fuel type and ethanol compatibility for every hose and seal
• Choose EFI rated hose for fuel injected pressure requirements
• Match hose inside diameter to the vehicle or build fuel demand
• Check AN size, thread type and sealing method for adapters
• Measure the required length before ordering universal hose or hard line
• Keep lines clear of exhaust heat, sharp edges and moving suspension
• Use approved clamps, fittings and protective sleeving where needed
• Inspect supply, return, filler and vent paths during fuel system service
• Pressure test every connection and check for leaks before driving

Common Questions

What fuel line hose should I use for EFI?

Use hose specifically rated for fuel injection pressure and compatible with the fuel used in the vehicle. Check the product pressure rating and fuel compatibility details.

Can I use regular rubber hose for a fuel injected vehicle?

Only use hose rated for the vehicle fuel pressure and fuel type. Ordinary low pressure hose may not be suitable for an EFI system.

What does AN mean in a fuel system?

AN is a sizing and fitting standard commonly used for performance fluid plumbing. Match the hose size, fitting thread and sealing method across the complete system.

How do I choose fuel line diameter?

Use the vehicle specification or calculate based on engine power, fuel type, pump flow and return system design. Larger lines may be needed for high output or boosted builds.

Do fuel lines need to be ethanol compatible?

Yes. If the vehicle uses ethanol blended fuel or E85, verify the hose, seals and fittings are rated for that fuel.

What is included in a fuel rail line kit?

Contents vary by kit. A vehicle specific kit may include hose, fittings, adapters and mounting hardware. Review the listing before ordering.

Can I repair only one section of fuel line?

A damaged section can sometimes be repaired with compatible rated components. Inspect the rest of the line route for age, corrosion and wear at the same time.

How should fuel lines be routed?

Keep fuel lines away from exhaust heat, moving parts and sharp edges. Use secure clamps and protection where the line passes through or near metal panels.

Do I need to pressure test a fuel system?

Yes. Test for leaks after any fuel line, hose, fitting or rail work before starting the engine or driving the vehicle.

How can I confirm fuel line fitment?

Use the year, make, model, trim, engine and drivetrain filters, then compare hose size, fittings and connection points to the existing fuel system.

Why Buy Fuel Lines from Black Ops Auto Works

Black Ops Auto Works stocks 56 fuel line products with details for direct fit service and custom EFI routing. Shop compatible hose, rails, adapters and fittings with real fitment data and helpful support for your fuel system build.

For focused shopping, browse our Fuel Delivery, Fuel Rails, Fuel Pumps, Fuel Injectors, Fittings, O Rings, Aeromotive, Radium Engineering.