Answering the common question: which EFI components work best with E85 in an LS swap or EFI upgrade? The right combination includes high-pressure PTFE fuel lines, compatible fittings, and a reliable in-tank pump. This guide highlights five products well-suited for E85-compatible EFI systems, focusing on durability, temperature tolerance, and PSI capacity. Ideal buyers include LS swaps, turbo or high-performance builds, and enthusiasts upgrading to E85. Below is a quick summary table of the featured items.
| Product | Best For | Key Benefit |
|---|---|---|
| Medoon 6AN PTFE Fuel Line Kit | LS swap and EFI builds | Comprehensive kit with 26 ft line and multiple fittings |
| EVIL ENERGY 6AN PTFE Fuel Line Kit (26 ft) | High-mileage EFI/LS setups | PTFE line with high-pressure capability |
| EVIL ENERGY 6AN PTFE Fuel Line Kit (25 ft) | Compact long runs | 20–26 ft options with robust specs |
| BRIFITOR 6AN 25FT PTFE Line Kit | All-around EFI/LS use | Includes hose end fittings wrench and PTFE hose assembly tool |
| Aeromotive Phantom 340 In-Tank Fuel Pump | High-flow EFI applications | In-tank pump compatible with EFI/carb setups |
Medoon 6AN PTFE Fuel Line Kit
Best for LS swap enthusiasts who want a complete PTFE solution. The kit includes 26 feet of AN6 fuel line, 12 PTFE hose end fittings, 4 quick disconnects, 6 hose separators, 2 AN6 male couplers, plus a standard wrench and reaming tool. The line’s inner diameter is 3/8″ with a 0.465″ outer diameter, rated for up to 3000 PSI working pressure and 10000 PSI bursting pressure. Temperature tolerance from -76°F to 446°F makes it a solid E85-compatible choice for high-heat environments.
Who it’s best for: builders needing a turnkey EFI/LS swap solution with ample length and all necessary fittings. Better for: dedicated EFI upgrades requiring high-pressure PTFE lines. Caution: verify fitment for tight bends in older tanks—some installations may need additional hose separators or clamps.
EVIL ENERGY 6AN PTFE Fuel Line Kit 26FT
This 26-foot PTFE hose kit is designed for broad automotive use, including EFI LS systems and E85 compatibility. It features a 5/16″ ID (0.31″) and 0.45″ OD tube, with a working temperature range of -76°F to 446°F and a maximum working pressure of 1,500 PSI (burst 4,500 PSI). It’s best for long runs between a fuel tank and engine bay, and for users who want a straightforward, all-purpose PTFE line solution.
Best for: longer runs in modern EFI builds where durability under high heat is critical. Choose this if: you need a simple, all-in-one kit with robust pressure specs. Avoid this if: you require multiple custom lengths beyond 26 ft without additional fittings.
EVIL ENERGY 6AN 3/8″ PTFE LS Swap EFI Fuel Line Kit
Best for flexible EFI routing with LS swaps. This 25-foot PTFE line uses 5/16″ ID and 0.45″ OD, rated for -76°F to 446°F and 1,500 PSI working pressure, with a burst pressure around 4,500 PSI. It’s suitable for a range of high-temperature, high-pressure applications, including fuel injection lines and turbo feeds. The included components align well with typical LS swap needs beyond simple fuel delivery.
Who it’s best for: builders needing a compact yet capable PTFE line kit for LS swap EFI projects. Better for: versatility across fuel, oil, and coolant lines in a performance setup. Caution: confirm all included fittings match your AN size and fuel system layout before purchase.
BRIFITOR 6AN 25FT PTFE Fuel Line Kit
Best for all-around EFI/LS use with inclusive tooling. The kit features a Nylon/Stainless Steel braided PTFE hose with 6AN fittings and 25 feet of line. Specifications include ID 0.31″ (8 mm), OD 0.44″ (11.3 mm), temperature range -76°F to 446°F, max working pressure 3000 PSI, and bursting pressure 10000 PSI. Bonus: includes an adjustable AN fittings wrench and a PTFE hose assembly tool for easier installation.
Best for: users wanting a durable, all-purpose PTFE line kit with handy assembly tools. Choose this if: you value included wrenches for faster fitting assembly. Limitation: heavier braided hose can be stiffer to route in tight engine bays.
EVIL ENERGY 6AN PTFE Fuel Line Kit 10FT
Best for short-run EFI configurations or compact engines. This 10-foot PTFE line features ID 0.31″ and OD 0.45″, with a -76°F to 446°F operating range and 1,500 PSI maximum working pressure. It’s compatible with all automotive fuels, lubricants, and coolants. This is ideal for tight routing in tight engine compartments or for finishing a short EFI loop.
Choose this if: you need a shorter, flexible option for small, high-performance builds. Avoid if: you require longer runs for a tank-to-engine path as part of an upgraded EFI system.
Aeromotive Phantom 340 In-Tank Fuel Pump System
Best for high-flow EFI applications needing submersion in fuel to prevent starvation. The Phantom 340 is an in-tank system capable of delivering up to 340 LPH at 40 PSI, supporting EFI up to about 850 HP or carbureted setups up to 1,000 HP. It includes a fuel-resistant internal basket and baffling to minimize slosh and maintain consistent delivery as fuel levels fluctuate.
Who it’s for: performance builds requiring reliable, high-volume fuel delivery in EFI or carbureted configurations. Better for: maintaining stable fuel pressure during aggressive driving. Caution: ensure tank compatibility and hanger fitment before purchase.
Buying Guide: Key Considerations For EFI Systems Using E85
- Fuel compatibility: E85 is more corrosive and requires PTFE or compatible nylon braided hoses with appropriate fittings.
- Pressure rating: match hoses to your EFI system’s fuel pressure; higher horsepower builds need lines rated well above typical EFI pressures.
- Line length and routing: plan runs to minimize sharp bends; longer runs demand sturdier clamps and possibly additional separators.
- Temperature tolerance: look for lines rated to at least -60°C to 230°C to handle cold starts and hot engine bays.
- In-tank pump considerations: for EFI, a high-flow pump helps prevent fuel starvation during track use or fast acceleration.
- Included tools: some kits come with wrenches and hose assembly tools—these can simplify installation and reduce the risk of leaks.
- Fitment and compatibility: verify AN sizes and connector types with your existing fuel rails, regulators, and fittings.
FAQs
- What makes PTFE hose better for E85 EFI systems? PTFE hoses resist ethanol and high temperatures better than many standard rubbers, reducing permeability and swelling.
- Can I use any fuel pump with E85? In-tank pumps designed for EFI or carbureted systems with E85 compatibility provide reliable flow, but verify flow rate and pressure for your engine.
- Is a longer hose always better? Not necessarily; longer hoses add potential resistance and routing challenges. Plan the run to minimize bends and keep pressure stable.
- Do I need fittings beyond what’s in the kit? Some installations require extra adapters or specific AN fittings; check your system schematic before starting.
- What are signs of a failing EFI fuel line in an E85 setup? Leaks, hard starting, fuel odor, or inconsistent idle can indicate hose or fitting issues.
- Are In-tank pumps necessary for all EFI builds? No, but for high-demand or performance applications, an in-tank pump can improve supply reliability and reduce cavitation.
