EVIL ENERGY 6AN PTFE LS Swap EFI Fuel Line Kit 25ft - High Pressure

Our review of the EVIL ENERGY 6AN PTFE LS Swap EFI Fuel Line Kit finds it best suited for builders and DIY mechanics converting EFI systems or performing LS engine swaps who need a durable, chemical-resistant line. The single biggest reason to choose this kit is its PTFE core with nylon braid, which resists fuels and high temperatures while offering very high working and burst pressures for demanding engine bay applications. It ships with all fittings shown and a 25ft length that covers routing needs for many installs, though fit checks are advised before trimming.

Key Features

• Broad application: Designed for EFI LS systems, turbo oil feed, transmission cooler lines and many other high-temperature and high-pressure uses.
• 6AN sizing: The kit uses AN-6 hose with a 5/16' ID and 0.45' OD, giving a common fit for fuel injection plumbing and returns.
• High temperature range: Rated from -76F to 446F, the hose tolerates extreme heat and cold for underhood routing.
• High pressure rating: With a 1,500 PSI working pressure and 4,500 PSI burst pressure, the line provides safety margin for boosted and EFI applications.
• Fuel compatibility: PTFE core construction is compatible with automotive fuels, lubricants and coolants for flexible use.
• Complete kit: Includes the components shown in the product images along with a 25ft length to cover most swap and conversion runs.

Who It's For

The kit is aimed at automotive enthusiasts performing LS swaps, EFI conversions or building turbocharged engines who need a durable PTFE fuel line that resists chemical attack and heat. It is also useful for custom plumbing tasks like vapor return lines, vacuum lines and transmission cooler runs where AN-6 sizing is appropriate.

Those who should look elsewhere include installers who require very flexible fuel hose for tight bends or applications that demand metric sizes not covered by AN-6. Also, anyone uncomfortable with trimming and fitting semi-rigid PTFE hose should seek professional installation or a pre-assembled hose alternative.

Pros & Cons

Pros

• Well-built PTFE core with nylon braid offers strong chemical and temperature resistance.
• High working and burst pressures give confidence in boosted and EFI systems.
• Includes 25ft of hose and necessary fittings for many swap projects, delivering good value for money.
• Compatible with a wide range of automotive fluids for versatile use.

Cons

• Relatively rigid hose can be difficult to bend; professional installation is recommended.
• Some customers report fitment issues or occasional leaks if fittings are not installed or measured precisely.

Specifications

Brand	EVIL ENERGY
Hose size	6AN (ID 5/16' / 0.31') OD 0.45'
Length	25ft
Working temperature	-76F to 446F (-60C to 230C)
Working pressure	1,500 PSI
Burst pressure	4,500 PSI
Compatible media	Automotive fuels, lubricants and coolants

Our Verdict

The EVIL ENERGY 6AN PTFE LS Swap EFI Fuel Line Kit is a strong value for builders who need a chemical-resistant, high-pressure hose for EFI swaps, turbo fuel feeds and related plumbing. Its 25ft length and robust ratings make it a practical choice for many projects, but installers should plan fittings carefully and expect a firmer hose that benefits from professional handling.

Frequently Asked Questions

Is this hose compatible with E85?
Yes, the PTFE core is compatible with automotive fuels including ethanol blends such as E85.

Can the hose be bent sharply to fit tight spaces?
The hose is relatively rigid and should not be folded or sharply bent; gentle sweeps or the use of fittings and routing brackets is recommended.

What should I do about fitment or leaks?
Measure fittings and hose ends carefully before cutting; if leaks occur, check fitting installation and consider professional installation to ensure proper sealing.