When swapping an LS engine, choosing the right fuel line kit is essential for reliability, performance, and safety. This guide highlights five well-regarded 6AN and PTFE fuel line kits designed for LS swaps, EFI conversions, and high-performance applications. Each option balances pressure ratings, temperature tolerance, and compatibility with common fuels. Use this overview to compare features, fitment notes, and installation considerations before purchasing.
Product Summary
| Product | Brand | Type | Length | Key Benefit |
|---|---|---|---|---|
| EVIL ENERGY 6AN Fuel Line Kit with LS Swap Fuel Filter Regulator 58PSI 6AN CPE Hose Braided Fuel Line Fitting Kit 20FT | EVIL ENERGY | Braided Nylon | 20 ft | Built-in regulator maintains 58 psi |
| EVIL ENERGY 6AN 3/8″ PTFE LS Swap EFI Fuel Line Fitting Kit, E85 Nylon Braided Fuel Hose 25FT | EVIL ENERGY | PTFE Nylon | 25 ft | High-pressure PTFE line with wide temp range |
| EVIL ENERGY 6AN PTFE Fuel Line Kit, E85 Nylon Braided Fuel Hose 26FT PTFE LS Swap EFI Fuel Line Fitting Kit AN6 | EVIL ENERGY | PTFE Nylon | 26 ft | Long length with strong heat resistance |
| EVIL ENERGY 6AN PTFE Fuel Line Kit, E85 Nylon Braided Fuel Hose 20FT PTFE LS Swap EFI Fuel Line Fitting Kit AN6 | EVIL ENERGY | PTFE Nylon | 20 ft | Compact option with robust performance |
| BDFHYK 6AN Fuel Line Kit, AN6 CPE Fitting Kit, LS Swap Fuel line kit, 10FT Nylon Stainless Steel Braided Fuel Hose | BDFHYK | Nylon Stainless | 10 ft | Stainless braided middle with durable outer layer |
EVIL ENERGY 6AN Fuel Line Kit With LS Swap Regulator
This kit fits common LS swap EFI conversions and fuel injection systems. It features a braided 6AN hose assembly designed to handle gasoline and similar fuels with a practical regulator inside the LS swap fuel filter regulator. The regulator maintains a steady output pressure around 58 psi, aligning with manyLS-based EFI requirements. The included 20-foot length helps accommodate typical engine bay routing. Maximum working pressure is up to 750 psi, with a bursting pressure near 2250 psi and a wide operating temperature window from -22°F to 248°F. Compatibility notes indicate use with gasoline and other fuels, excluding E85 or ethanol blends in some configurations.
EVIL ENERGY 6AN 3/8″ PTFE LS Swap EFI Fuel Line Kit
This PTFE-based nylon braided fuel line kit is tailored for EFI LS engines and LS swaps. It supports high-temperature and high-pressure environments, with a maximum working pressure of 1,500 psi and a bursting pressure around 4,500 psi. The kit’s dimensions include a 5/16″ ID (0.31″) and a 0.45″ OD, with a total length of 25 ft. It’s versatile for fuel injection lines, turbo oil feeds, boost lines, and related high-temperature applications. Ensure proper measurement prior to purchase to confirm fitment in the intended routing.
EVIL ENERGY 6AN PTFE Fuel Line Kit, E85 Nylon Braided 26FT
Designed for LS swap EFI fuel lines, this 26-foot PTFE kit uses a nylon braided outer layer for durability and flexibility. The 6AN line features a 5/16″ inner diameter and a 0.45″ outer diameter, suited for high-temperature operation from -76°F to 446°F (-60°C to 230°C). With a maximum working pressure around 1,500 psi and a bursting pressure near 4,500 psi, this kit is suitable for all automotive fuels, lubricants, and coolants, making it a strong all-rounder for EFI LS configurations.
Autoutfit 6AN PTFE Fuel Line Kit For LS Swap
This 6AN PTFE hose kit is built for EFI LS systems and supports a range of fuels beyond gasoline, including diesel, oil, and coolant. It offers a PTFE inner tube with a maximum working pressure of 3,000 psi and a bursting pressure of 10,000 psi, reflecting robust performance under extreme conditions. The hose length is 25 ft, with an inner diameter of 0.3″ and an outer diameter of 0.47″. The kit includes compatible fittings and swivel ends crafted from aluminum for durability and reliable sealing in tight engine bays.
BDFHYK 10Ft 5/16″ ID PTFE LS Swap Kit
Offering a 10-foot PTFE fuel line with a 5/16″ ID (0.328″) and 9/16-18 UNF (6AN) fittings, this kit handles high temperatures up to 446°F and high pressures up to 1,500 psi. The 0.468″ outer diameter and stainless steel braided middle reinforce durability, while the outer nylon layer provides additional protection. The kit is described as compatible with a broad range of fuels, lubricants, and coolants, making it a versatile solution for LS swap EFI systems and related high-performance builds.
Buying Guide: Key Purchase Considerations For LS Swaps
Choosing the right fuel line kit for an LS swap requires weighing several practical factors. The following considerations help buyers compare options and reduce the risk of failure in the engine bay.
- Line material and construction: PTFE hose with nylon braid offers excellent chemical resistance and high heat tolerance, while nylon braided lines are more flexible and easier to route but may have lower max temperatures.
- Pressure ratings: Ensure the kit’s maximum working pressure and bursting pressure align with your fuel system’s demands, especially for high-boost engines or turbo setups.
- Temperature range: LS swaps can experience extreme conditions; select hoses rated for wide temperatures to avoid hardening or degradation under heat exposure.
- Fuel compatibility: Check whether the hose supports gasoline, diesel, E10/E15, or E85 mixtures, and confirm any ethanol restrictions for your hardware.
- Length and routing: Accurate hose length is critical; measure from the fuel rail to the regulator and across the engine bay, accounting for bends and clamps.
- Fittings and hardware: Ensure compatible AN size (6AN is common) and end fittings, plus corrosion-resistant materials like aluminum or stainless steel for longevity.
- Installation considerations: Plan for clean routing with protection from heat sources, vibration, and sharp edges. Utilize clamps, harnesses, and separators to avoid chafing.
- Reliability and brand support: Reputable brands with good customer support and access to replacement fittings can ease maintenance and future upgrades.
Comparison At A Glance
For LS-swap projects, PTFE-based lines generally provide stronger heat resistance and higher pressure ratings, making them suitable for EFI systems and turbocharged builds. Nylon braided lines offer flexibility and cost benefits but may require more careful heat management in extreme setups. Length, compatibility with ethanol blends, and the regulator features (such as built-in filtering and pressure regulation) should guide final choices based on engine goals and installation constraints.
The selections above emphasize LS swap suitability, reliability under engine bay temperatures, and compatibility with common fuels used in American performance vehicles. When in doubt, consult with a professional installer or the manufacturer’s technical resources to verify fit and safety for your specific build.