Three-Layer CPE Braided Hose Construction
The EVIL ENERGY 6AN hose uses three primary layers:
CPE inner tube → 304 stainless-steel reinforcement → nylon outer braid
Each layer performs a different job.
CPE Rubber Inner Tube
The CPE inner liner provides the fluid-carrying surface and is compatible with several petroleum-based automotive fluids.
304 Stainless-Steel Reinforcement
A stainless-steel reinforcement layer adds strength to the hose and helps it withstand pressure while maintaining flexibility.
Nylon Outer Braid
The exterior nylon braid provides additional abrasion protection and gives the hose the appearance commonly associated with modern performance AN plumbing.
This construction makes the hose useful in engine compartments, underbody plumbing, transmission-cooler installations, and other custom automotive applications when properly routed.
750 PSI Working Pressure
The hose carries a listed 750 PSI maximum working-pressure rating with a 2,250 PSI burst-pressure rating.
That provides substantial pressure capacity for many automotive fluid systems.
However, hose pressure rating should never be interpreted as the pressure rating of the entire assembled system.
Actual system capability is determined by its weakest component, including:
- Hose
- Hose ends
- Adapters
- Filters
- Regulators
- Pumps
- Coolers
- Sensors
- Seals
- Hard-line transitions
Every component should be appropriate for the intended fluid, temperature, and pressure.
10 Swivel Hose Ends with Four Different Angles
A major advantage of this EVIL ENERGY kit is the included fitting assortment.
4 Straight Fittings
Straight fittings are useful where the hose has a clear path away from a fuel rail, regulator, filter, cooler, or other component.
2 45-Degree Fittings
45-degree hose ends can provide a smoother transition where a straight fitting would create an awkward hose bend.
2 90-Degree Fittings
90-degree fittings are useful in tighter engine compartments or where the hose needs to turn immediately after leaving a component.
2 180-Degree Fittings
180-degree hose ends can be particularly useful for fuel rails, coolers, regulators, and other installations where the plumbing must reverse direction in limited space.
Using the correct fitting angle can reduce hose stress and produce a cleaner installation.
6AN Fuel Supply Line Applications
The kit can be used as a 6AN fuel supply line in compatible gasoline and diesel systems.
Whether 6AN is appropriately sized depends on the engine’s fuel demand and complete system design.
Factors include:
- Engine horsepower
- Fuel type
- Fuel pressure
- Fuel-pump flow
- Injector capacity
- Hose length
- Number of fittings
- Filter restriction
- Naturally aspirated or forced induction
A 6AN line is commonly used in many performance fuel systems, but line size should always be matched to actual fuel-flow requirements.
6AN Fuel Return Line Applications
The hose can also be used for compatible fuel return-line plumbing.
Return-line sizing is especially important in bypass-regulated fuel systems because excess fuel must be able to travel back toward the tank without excessive restriction.
An undersized or poorly routed return line can make fuel pressure difficult to regulate.
For a deeper explanation of how feed lines, regulators, and return circuits interact, the Pro Street Fuel Pressure Regulator Guide covers return-style fuel systems and pressure control in detail.
If you’re fabricating a complete return-style system, the Pro Street Fuel Pressure Regulator Installation Guide also provides useful background on regulator placement and return-line plumbing.
Suitable for Gasoline Fuel Systems
The supplied CPE hose is advertised as compatible with gasoline.
That makes the kit useful for custom carbureted and EFI plumbing where the pressure, temperature, hose size, and fitting specifications are appropriate.
Potential applications include:
- Fuel pump lines
- Fuel filter plumbing
- Fuel rails
- Fuel pressure regulators
- Carburetor feed lines
- EFI fuel feeds
- Fuel return circuits
- Engine-swap fuel systems
Always verify compatibility with the exact fuel formulation being used.
Diesel Fuel Line Applications
The hose is also listed as compatible with diesel fuel.
That makes it useful for compatible custom diesel supply and return plumbing, including modified lift-pump systems and other low- or moderate-pressure diesel applications where the hose specifications are appropriate.
This hose should not be used as a substitute for specialized high-pressure common-rail injector tubing.
The thousands of PSI found on the high-pressure side of a modern common-rail diesel system require application-specific hard lines and fittings.
Not Compatible with E85, E10 or Methanol
This limitation deserves special attention:
Do not use the supplied hose with E85, E10, or methanol.
That means this particular kit is not the right choice for many ethanol-blended street fuels or dedicated ethanol performance builds.
If your vehicle uses ethanol-containing fuel, select hose and fittings specifically rated for that fuel chemistry.
Do not assume that “race fuel compatible” automatically means “ethanol compatible.” Fuel chemistry is annoyingly specific like that.
Race Gas Compatibility
The hose is listed for compatible race gasoline applications.
Because race fuels vary considerably in composition, verify compatibility with the specific fuel manufacturer before long-term use.
Oxygenated and alcohol-containing racing fuels can have very different material requirements from conventional gasoline.
Engine Oil and Turbo Oil Line Applications
The kit can also be used for compatible engine-oil plumbing.
Possible applications include:
- Oil cooler lines
- Remote oil filters
- Oil catch systems
- Turbo oil feeds where specifications are appropriate
- Custom lubrication circuits
Temperature and pressure at the intended installation point should be verified before use.
Turbocharger plumbing deserves particular attention because areas around the turbine housing can exceed the hose’s rated temperature.
Keep flexible hose appropriately separated from exhaust heat.
Transmission Cooler Line Applications
The 6AN hose can be used for compatible automatic transmission cooler plumbing.
The included 45-, 90-, and 180-degree fittings can be especially useful when routing lines around transmissions, crossmembers, radiators, and external coolers.
Before installation, confirm:
- Transmission-fluid compatibility
- Operating pressure
- Fluid temperature
- Cooler fitting size
- Transmission fitting type
Adapters may be necessary because transmission ports frequently use threads other than AN.
Hydraulic and Vacuum Applications
The hose is also advertised for compatible hydraulic-fluid and vacuum applications.
Actual suitability depends on the fluid, temperature, pressure or vacuum level, and fittings being used.
Always verify the requirements of the specific system before installation.
AN and NPT Threads Are Not Interchangeable
This is one of the most important installation details.
AN and NPT fittings are not the same thing.
The 6AN connection uses a 9/16-18 UNF straight thread and seals at the AN flare.
NPT uses a tapered pipe thread and seals differently.
Do not force an AN fitting into an NPT port simply because the diameters look suspiciously close.
That generally converts a simple plumbing project into a thread-repair project.
Use the correct adapter when transitioning between AN and NPT components.
Why Use AN Fuel Lines?
AN-style plumbing is popular in performance vehicles because it provides standardized fitting sizes, multiple hose-end angles, and a clean method for assembling custom fluid systems.
Advantages can include:
- Reusable-style hose ends
- Multiple fitting angles
- Consistent sizing
- Easy custom routing
- Wide range of adapters
- Serviceability
- Clean engine-bay appearance
The important part is matching the AN system to the fluid and application rather than selecting it solely because braided hose looks fast while parked.
Hose Routing Recommendations
Correct routing is critical for reliability.
Keep the hose away from:
- Exhaust manifolds
- Headers
- Turbocharger turbine housings
- Driveshafts
- Steering shafts
- Suspension travel
- Sharp sheet-metal edges
- Belts and pulleys
- Electrical terminals
Use the supplied separator clamps where appropriate and add additional supports when needed.
Long sections of flexible hose should not be left unsupported beneath the vehicle.
Installation Tips
Before cutting the hose, plan the complete route and identify the fitting angle required at each connection.
A good installation process includes:
- Verify all component port sizes.
- Confirm the fluid is compatible with the CPE hose.
- Plan the entire hose route.
- Determine which straight, 45°, 90°, or 180° fitting belongs at each connection.
- Measure each hose section carefully.
- Make clean, square cuts.
- Prevent braid contamination from entering the hose.
- Assemble each hose end according to the fitting instructions.
- Route the hose away from heat and moving components.
- Support long hose sections securely.
- Connect fittings without cross-threading.
- Pressure-test or prime the system.
- Inspect every connection for leakage.
- Recheck all fittings after the first heat cycle.
Never perform fuel-system leak checks around open flames or ignition sources.
Why Choose the EVIL ENERGY 6AN 20FT Fuel Line Kit?
This kit combines a substantial length of hose with a particularly useful selection of fitting angles.
Key features include:
- 20 feet of 6AN hose
- 0.31-inch / 8 mm ID
- CPE rubber inner liner
- 304 stainless-steel reinforcement
- Nylon outer braid
- 750 PSI working-pressure rating
- 2,250 PSI burst rating
- -22°F to 248°F temperature range
- Four straight hose ends
- Two 45-degree hose ends
- Two 90-degree hose ends
- Two 180-degree hose ends
- Two separator clamps
- Gasoline and diesel compatibility
- Engine-oil and transmission-fluid applications
- Multiple custom automotive plumbing uses
For builders who need more than two fittings and six feet of hose before the project has even reached the firewall, the 20-foot EVIL ENERGY kit provides a useful starting point for a complete custom plumbing installation.
Frequently Asked Questions
What size is the EVIL ENERGY fuel hose?
The supplied hose is 6AN, measuring approximately 0.31 inch (8 mm) ID and 0.56 inch (14.3 mm) OD.
How much hose is included?
The kit includes 20 feet of 6AN CPE nylon-braided hose.
How many hose ends are included?
Ten swivel hose ends are included: four straight, two 45-degree, two 90-degree, and two 180-degree fittings.
Are hose separators included?
Yes. Two hose separator clamps are included.
What is the working-pressure rating?
The hose is rated for up to 750 PSI working pressure.
What is the burst-pressure rating?
The listed burst pressure is 2,250 PSI.
What is the temperature range?
The listed temperature range is -22°F to 248°F.
Can I use this hose for gasoline?
Yes, the hose is listed as compatible with gasoline.
Can I use it for diesel?
Yes, it is listed for compatible diesel fuel applications. It is not a replacement for specialized high-pressure common-rail injector tubing.
Is the hose E85 compatible?
No. The supplied hose is not listed as compatible with E85.
Can I use it with E10 gasoline?
No. E10 is specifically listed as incompatible.
Is it methanol compatible?
No. Do not use this hose with methanol.
Can it be used as a fuel return line?
Yes. The hose can be used for compatible 6AN fuel return-line applications where its size, pressure, temperature, and fuel compatibility meet the system requirements.
Can it be used for transmission cooler lines?
Yes, it is advertised for compatible transmission-fluid and cooler-line applications.
Is 6AN the same as 3/8-inch NPT?
No. 6AN and 3/8-inch NPT are completely different thread systems. Use the correct adapter when connecting an AN hose end to an NPT component.
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