Built-In 10-Micron Fuel Filter
The 58 PSI regulator also incorporates a 10-micron fuel-filter element.
Combining filtration and pressure regulation into one component reduces the number of separate components that need to be mounted and connected during a swap.
The filter helps capture contaminants before fuel reaches the injectors.
This is particularly valuable during an engine swap because custom fuel systems frequently involve:
- Modified fuel tanks
- New pumps
- New hose
- Adapter fittings
- Fabricated fuel-pump hangers
- Existing hard lines
- Newly assembled AN fittings
Any contamination introduced during fabrication can eventually make its way toward the injectors if adequate filtration isn’t present.
20 Feet of 6AN Braided Fuel Hose
The kit includes 20 feet of 6AN braided CPE fuel hose, providing enough material for many front-engine swap applications.
Fuel hose dimensions are:
Inside Diameter: 0.31 inch
Outside Diameter: 0.56 inch
AN Size: 6AN
Length: 20 feet
The generous hose length gives builders flexibility when routing fuel from the rear of the vehicle toward the engine compartment.
Extra length is especially useful on custom swaps because the shortest possible route isn’t always the safest route. Fuel hose should be kept away from exhaust components, driveshafts, suspension travel, steering components, sharp edges, and other hazards.
CPE Inner Hose with Stainless-Steel Reinforcement
The EVIL ENERGY hose uses a multi-layer design consisting of:
CPE rubber inner layer → 304 stainless-steel wire reinforcement → nylon outer braid
The CPE inner layer carries the fuel, while the stainless-steel reinforcement provides additional pressure strength. The nylon outer braid helps protect the hose against abrasion while providing the appearance commonly associated with aftermarket AN plumbing.
The supplied fittings use aluminum-alloy construction for a durable and lightweight fuel-system connection.
750 PSI Maximum Working Pressure
The supplied braided hose is rated for:
Maximum Working Pressure: 750 PSI
Burst Pressure: 2,250 PSI
Temperature Range: -22°F to 248°F
Those ratings provide substantial pressure capability compared with the approximately 58 PSI operating pressure targeted by the included LS filter/regulator.
Remember that the hose rating doesn’t automatically determine the rating of the entire assembled fuel system. Pumps, filters, fittings, adapters, rails, seals, and other components must all be compatible with the fuel and operating pressure being used.
Gasoline and Diesel Compatible Hose
The supplied CPE braided hose is advertised as compatible with gasoline, diesel, and other compatible petroleum fuels.
However, there is an important distinction between the hose and the complete LS swap kit.
The 58 PSI regulator configuration is intended primarily for gasoline EFI/LS swap applications, and the product is not an E85 kit.
Do Not Use With E85 or Ethanol Fuel
The supplied hose is specifically listed as not compatible with E85 or ethanol-based fuels.
If you’re planning an E85 LS build, choose ethanol-compatible hose, seals, filter media, regulator components, pump, and injectors throughout the entire fuel system.
Do not assume that a component is ethanol-safe simply because it is rated for gasoline.
10 Swivel Hose Ends Included
The package includes 10 swivel hose ends, providing the fittings required for many common custom fuel-system layouts.
Swivel fittings make hose routing easier because the fitting can be oriented during assembly rather than forcing the hose into an unnatural position.
This helps reduce:
- Hose twisting
- Tight bends
- Unnecessary strain on fittings
- Poor routing around chassis components
- Installation frustration accompanied by vocabulary unsuitable for the service manual
The kit also includes three adapter fittings to help integrate the AN hose with the filter/regulator and other compatible fuel-system components.
Hose Separator Clamps Keep the Installation Organized
Two hose separator clamps are included to help secure and organize the braided line.
Proper hose support is more than cosmetic.
Fuel lines should not be allowed to rub continuously against:
- Sheet metal
- Frame rails
- Suspension components
- Transmission housings
- Driveshaft tunnels
- Exhaust systems
- Electrical wiring
A properly supported line reduces abrasion and helps produce a cleaner, safer engine-swap installation.
How the 58 PSI LS Swap Fuel System Works
A typical installation using this style of filter/regulator can be arranged approximately as follows:
Fuel Tank → High-Pressure EFI Pump → 58 PSI Filter/Regulator → 6AN Feed Line → LS Fuel Rail
The regulator’s bypass routes excess fuel back toward the tank.
This arrangement is popular in LS conversions because it can keep the long return circuit toward the rear of the vehicle while sending a single regulated feed line forward to the engine.
That can significantly simplify plumbing compared with mounting an adjustable bypass regulator in the engine compartment and running a full-length return line back from the front of the vehicle.
For a broader explanation of bypass regulation and fuel-system pressure control, the Pro Street Fuel Pressure Regulator Guide explains how regulators, pumps, return circuits, and fuel pressure work together.
Why 58 PSI Matters on an LS Swap
Many factory GM LS EFI systems are designed around fuel pressure in the neighborhood of 58 PSI, or roughly 4 bar.
Fuel pressure matters because injector flow depends partly on the pressure differential across the injector.
If pressure is too low, the injectors may not deliver the expected amount of fuel.
If pressure is excessively high, injector flow increases while pump flow capability may decrease, potentially creating calibration and reliability problems.
The goal isn’t simply to create as much fuel pressure as possible. It’s to provide the pressure and volume the engine management system expects.
If you’re building a complete LS swap rather than replacing only the fuel plumbing, Pro Street’s Ultimate GM LS Engine Guide is a useful companion for understanding the LS family and planning the rest of the conversion.
Fuel Plumbing Is Only Half of an LS Swap
An LS engine still needs proper engine management once the fuel system is supplying consistent pressure.
The PCM requires clean power, grounds, sensor inputs, injector control, ignition control, and correctly configured wiring to operate properly.
The Pro Street LS1 Wiring Diagram Guide explains LS1 power circuits, grounds, sensors, PCM connections, and common swap wiring configurations—particularly useful when your freshly plumbed 58 PSI fuel system is working perfectly but the engine still refuses to start because somebody forgot a ground.
Can 6AN Fuel Line Support an LS Engine?
For many naturally aspirated and moderately modified LS applications, 6AN fuel line is a commonly used size, but suitability depends on the complete fuel system.
Required fuel flow changes according to:
- Engine horsepower
- Naturally aspirated vs. forced induction
- Fuel type
- Fuel pressure
- Injector size
- Pump capacity
- Hose length
- Number of fittings and restrictions
- Electrical voltage supplied to the pump
High-horsepower turbocharged, supercharged, or high-volume fuel applications may require larger feed plumbing and a different regulator configuration.
Do not select fuel-line size based solely on the engine being an “LS.”
Complete LS Swap Fuel Line Kit
The package includes:
- 20FT 6AN CPE braided fuel hose
- 1x 58 PSI filter/regulator
- 10x swivel hose ends
- 2x hose separator clamps
- 3x adapter fittings
- 1x installation wrench
The combination provides many of the major components required to create a custom LS swap fuel-feed system without purchasing every hose end and adapter individually.
Installation Recommendations
Before installing the kit, plan the entire fuel path from the tank to the engine.
Determine where the fuel pump, filter/regulator, return connection, feed line, and engine fuel rail will be located before cutting the supplied hose.
For a typical installation:
- Confirm that the engine requires approximately 58 PSI fuel pressure.
- Verify that every component is compatible with the fuel being used.
- Install a properly sized high-pressure EFI fuel pump.
- Mount the filter/regulator securely.
- Connect the pump outlet to the filter/regulator inlet.
- Connect the bypass/return outlet to the fuel tank return.
- Route the 6AN regulated feed line toward the engine.
- Assemble the hose ends according to the fitting manufacturer’s procedure.
- Secure the hose using appropriate clamps and supports.
- Keep fuel hose away from exhaust heat and moving components.
- Prime the fuel system before starting the engine.
- Inspect every connection carefully for leaks.
- Verify actual fuel pressure with a reliable gauge before operating the engine under load.
Fuel plumbing should never be routed where a failed hose could spray fuel directly onto an exhaust manifold, header, or other ignition source.
Why Choose the EVIL ENERGY 6AN LS Swap Fuel Line Kit?
The EVIL ENERGY kit packages several components LS swappers commonly need into one system:
- 20 feet of 6AN braided CPE fuel hose
- Fixed 58 PSI regulation
- Integrated 10-micron filtration
- Internal bypass return
- 10 swivel hose ends
- Adapter fittings
- Hose separator clamps
- High-pressure braided construction
For gasoline-powered LS swaps using a compatible factory-style 58 PSI EFI strategy, the result is a straightforward foundation for building the fuel-delivery system without sourcing every fitting individually.
It handles one of the less glamorous parts of an LS swap—which is useful, because eventually you’ll need that spare frustration for the wiring.
Frequently Asked Questions
What is included in the EVIL ENERGY LS swap fuel line kit?
The kit includes 20 feet of 6AN braided CPE hose, a 58 PSI filter/regulator, 10 swivel hose ends, two separator clamps, three adapter fittings, and an installation wrench.
What pressure does the LS swap regulator provide?
The included regulator is designed to provide approximately 58 PSI output pressure.
Does the regulator include a fuel filter?
Yes. The filter/regulator contains an integrated 10-micron fuel-filter element.
Is this a return-style fuel system?
The regulator contains an internal bypass and requires an appropriate return connection to the fuel tank.
What size is the fuel hose?
The hose is 6AN, with an approximately 0.31-inch inside diameter and 0.56-inch outside diameter.
How long is the supplied fuel hose?
The kit includes 20 feet of braided hose.
What is the maximum hose pressure?
The supplied hose is rated for a 750 PSI maximum working pressure and 2,250 PSI burst pressure.
What is the temperature rating?
The listed operating-temperature range is -22°F to 248°F.
Can I use this LS fuel line kit with E85?
No. The supplied hose is specifically listed as unsuitable for E85 and ethanol fuels.
Can the hose carry diesel fuel?
The CPE hose is advertised as compatible with diesel and other compatible petroleum fuels. However, the complete 58 PSI LS filter/regulator system is designed around EFI/LS swap applications and should only be used where every component meets the application’s requirements.
Will this kit fit an LS1?
It can be used with compatible LS1 swap fuel systems requiring approximately 58 PSI, provided the pump, rail connections, fuel requirements, and other system components are properly matched.
Will it work with a 5.3L LS swap?
Potentially, yes. Many GM 5.3L LS-family swap applications use similar EFI fuel-pressure requirements, but confirm the specific engine, fuel rail, injectors, PCM calibration, and fuel-system requirements before installation.
Is 6AN large enough for a turbo LS?
That depends on horsepower, fuel type, pump output, fuel pressure, hose length, and system restrictions. High-output forced-induction engines may require larger fuel plumbing and a higher-capacity regulator.
There are no reviews yet.