Choosing the right fuel line kit is crucial for LS swap builds, balancing pressure ratings, chemical compatibility, and installation length. The selections below focus on AN6 fuel line kits designed for LS-based engines, including PTFE and nylon braided options, with multiple lengths and built-in regulators or fittings. This guide highlights key features to help you compare options and select a kit that matches your EFI setup and fuel type.
Summary of Selected Products
| Product | Brand | Length | Core Material | Notable Feature |
|---|---|---|---|---|
| EVIL ENERGY 6AN Fuel Line Kit with LS Swap Fuel Filter Regulator | EVIL ENERGY | 20 ft | Braided hose with internal 10 micron filter | 58 PSI regulator |
| EVIL ENERGY 6AN 3/8″ PTFE LS Swap EFI Fuel Line Fitting Kit | EVIL ENERGY | 25 ft | PTFE nylon braided | High pressure up to 1,500 PSI |
| EVIL ENERGY 6AN PTFE Fuel Line Kit, E85 Nylon Braided 26 ft | EVIL ENERGY | 26 ft | PTFE nylon braided | All automotive fuels, lubricants, and coolants compatible |
| EVIL ENERGY 6AN PTFE Fuel Line Kit, E85 Nylon Braided 20 ft | EVIL ENERGY | 20 ft | PTFE nylon braided | Wide temperature range |
| BDFHYK 6AN Fuel Line Kit, AN6 CPE Fitting Kit | BDFHYK | 10 ft | CPE inner hose with stainless braided layer | High durability and aluminum swivel ends |
EVIL ENERGY 6AN Fuel Line Kit with LS Swap Regulator
The kit supports LS swaps and EFI conversions with a built-in 58 psi regulator and a 10 micron fuel filter element. It uses a 6AN braided line suitable for gasoline and diesel (not E85). Features include a maximum working pressure up to 750 psi and a bursting pressure around 2250 psi, with a temperature range from -22°F to 248°F. The kit is designed to deliver clean fuel to the engine, helping protect the LS drivetrain and extend engine life.
EVIL ENERGY 6AN 3/8″ PTFE LS Swap EFI Fuel Line Fitting Kit
This PTFE nylon braided kit is designed for EFI LS systems and related high-temperature/high-pressure applications. It can serve as a fuel injection hose, LS engine swap line, turbo oil feed, boost line, and more. The kit ID is 5/16″ (0.31″), with an outer diameter of 0.45″. It supports a working temperature range from -60°C to 230°C and a maximum working pressure of 1,500 psi, with a bursting pressure of 4,500 psi, making it suitable for demanding setups.
EVIL ENERGY 6AN PTFE Fuel Line Kit, E85 Nylon Braided 26 ft
This 26-foot PTFE fuel line kit uses PTFE hose with nylon braiding for durability. The ID is 5/16″ (0.31″), OD is 0.45″, and it supports a temperature range from -60°C to 230°C. With a maximum working pressure of 1,500 psi and bursting pressure of 4,500 psi, it is suitable for high-performance LS EFI applications using a range of automotive fuels and lubricants.
BDFHYK 6AN Fuel Line Kit, AN6 CPE Fitting Kit
Designed for versatile use, this 10-foot kit features AN6 CPE fittings and a mid-layer stainless steel braided hose with a black nylon outer wrap. It supports 750 psi working pressure and 2250 psi bursting pressure, with a temperature range between -22°F and 248°F. Aluminum swivel ends ensure durable, long-lasting connections for LS-based engines and related fuel systems.
Medoon 6AN PTFE Fuel Line Kit, 26 ft
Medoon’s 26-foot PTFE line kit emphasizes PTFE hose with nylon stainless steel braid and LS swap suitability. It includes multiple PTFE hose ends, a quick disconnect set, hose separators, and a standard wrench. The hose supports a temperature range from -60°C to 230°C and a maximum working pressure of 3,000 psi, with a bursting pressure up to 10,000 psi, making it a robust option for high-performance applications.
Autoutfit 6AN PTFE LS Swap EFI Fuel Line
Autoutfit’s kit targets EFI LS systems with PTFE hose rated up to 3,000 psi working pressure and 10,000 psi bursting pressure. It supports a broad application range including petrol, diesel, oil, hydraulic fluids, alcohol, E85, and coolants. The 25 ft length and PTFE composition provide high resistance to heat and chemicals, suitable for rigorous LS builds.
BDFHYK 10FT 5/16″ PTFE Fuel Line Kit
This 10-foot PTFE kit uses a 5/16″ ID hose with 9/16-18 UNF (6AN) fittings. It offers 1500 psi working pressure and 4500 psi bursting pressure, with a temperature range of -60°C to 230°C. The stainless steel braid and nylon outer layer provide durability for LS swap engine bays and high-temperature environments.
Buying Guide: Key Considerations for LS Swap Fuel Lines
- Material choice: PTFE lines tolerate higher temperatures and pressures than nylon braided lines, reducing risk in high-boost LS builds. PTFE with stainless braid often offers the best durability for EFI systems.
- Pressure ratings: Look for maximum working pressure and bursting pressure that exceed your system’s fuel pump output and EFI pressure demands. Typical LS EFI applications use lines rated well above 1,000 psi.
- Fuel compatibility: Confirm compatibility with gasoline, diesel, and ethanol blends. Some lines explicitly avoid E85 or ethanol; others are rated for all automotive fuels including ethanol-containing fuels.
- Length and routing: Choose a length that accommodates your engine bay routing, with extra slack for movement and maintenance. Consider separate lines for supply and return where needed.
- Fittings and ends: Ensure fittings are AN6 (6AN) compatible and include necessary adapters, quick disconnects, and swivel ends to ease installation and reduce leak points.
- Regulators and filters: Some kits include internal regulators or pre-filters to stabilize fuel pressure close to the engine. Assess whether you need a regulator integrated into the line or as a separate component.
- Heat management: In performance applications, shield or loom lines to protect against radiant heat from headers and exhaust components. Consider routing away from hot exhaust components when possible.
- Installation considerations: Reusable clamps, proper torque on fittings, and clean connections are essential to prevent leaks. Consider professional installation if you’re unfamiliar with high-pressure fuel lines.
- Cost vs. value: PTFE lines with stainless braiding tend to be pricier but offer superior durability and chemical resistance, which may be beneficial for daily drivers or race setups.
- Maintenance: Inspect lines for wear, fraying, or swelling, especially near fittings. Replace any line showing signs of damage to avoid fuel leaks or line failure.