6AN PTFE Fuel Line Kit 5/16 in Nylon Stainless Steel Braided - 20FT

In this review the 6AN PTFE Fuel Line Kit is assessed for engine swap and EFI fuel delivery tasks; it is aimed at enthusiasts and professionals who need a durable, fuel-compatible hose assembly. The kit's single biggest reason to buy is the complete 20ft of AN6 PTFE fuel line combined with fittings and tools, which lets installers route lines for LS swaps, turbo oil feeds, or transmission cooler runs without sourcing parts individually. The review finds the kit performs well when installed carefully, but notes the hose stiffness requires planned routing and professional installation for best results.

Key Features

• Complete kit: Includes 20ft of hose plus 12 PTFE hose end fittings, quick disconnects, clamps, couplers and a reaming tool to allow a single purchase to cover an entire fuel plumbing job.
• Durable construction: The PTFE core with nylon stainless steel braid resists corrosion and abrasion for long service life in engine bays and routed lines.
• Wide compatibility: Rated to handle most automotive fuels, lubricants and coolants so it can be used for EFI fuel injection, turbo oil feed or transmission oil cooler lines.
• High pressure rating: A maximum working pressure of 3000psi and bursting pressure of 10000psi provides a strong safety margin for EFI and boosted applications.
• Temperature range: Operates from -76F to 446F (-60C to 230C), covering hot engine compartments and cold-weather storage without rapid degradation.

Who It's For

The kit is best for DIY mechanics, professional installers and fabricators doing LS swaps, EFI conversions or custom fuel plumbing who want a ready-made package of hose, fittings and a reaming tool to avoid multiple vendors. It suits installations where corrosion resistance and chemical compatibility are priorities.

Those who need very flexible hose for tight bends or folding should look elsewhere, since the PTFE hose is relatively stiff and does not fold easily. Also, inexperienced users should consider professional installation because the fittings and hose require correct assembly and routing to meet the stated pressure and temperature performance.

Pros & Cons

Pros

• Comprehensive kit contents reduce time spent sourcing matching fittings and tools for an AN6 fuel plumbing job.
• PTFE core and nylon stainless braid offer strong chemical compatibility and abrasion resistance for long-term reliability.
• High working and bursting pressures provide safety margins for EFI and boosted systems.

Cons

• Hose is relatively hard and not suitable for tight folding; careful routing and bending allowances are required.

Specifications

Inner Diameter	5/16 in
Outside Diameter	0.465 in
Length	20 ft
Working Temperature	-76F to 446F (-60C to 230C)
Maximum Working Pressure	3000 psi
Bursting Pressure	10000 psi
Fitting Material	T6061 aluminum

Our Verdict

The 6AN PTFE Fuel Line Kit represents good value for anyone building or modifying fuel systems where compatibility and pressure capability matter. Its complete set of hose, fittings and tool saves procurement time and the corrosion-resistant materials make it a durable choice, but installers should plan routes and rely on professional assembly if unfamiliar with rigid PTFE hose to ensure leak-free service.

Frequently Asked Questions

Is this hose compatible with ethanol blends like E85?
Yes, the PTFE core is compatible with a wide range of automotive fuels including E85 and other ethanol blends.

Can the hose be bent in tight spaces?
The hose is relatively stiff and cannot be folded in half; plan routing and use clamps to secure gentle bends rather than sharp folds.

Are the fittings reusable?
The T6061 aluminum fittings are durable but proper disassembly and inspection are recommended before reuse; damaged fittings should be replaced.