Ideal for E85 Conversions and Performance Fuel Systems
Converting a performance vehicle to E85 often requires upgrades to fuel pumps, injectors, fuel lines, and engine management calibration.
Monitoring fuel pressure becomes especially important because E85 typically requires substantially more fuel volume than gasoline to support comparable engine output.
This EVIL ENERGY 6AN take-off fitting can be incorporated into compatible aftermarket fuel systems to provide a dedicated pressure monitoring port.
For additional information, read our Guide to Converting Your Vehicle to E85 and E85 Fuel Line Upgrade Tutorial at My Pro Street Online.
When using ethanol-blended fuels, verify the compatibility of the complete assembly, including the fitting, pressure sensor, seals, and any thread sealant.
Precision 37-Degree AN Flare Connections
The EVIL ENERGY adapter features industry-standard -6AN connection geometry.
The male and female AN connections use 37-degree flare sealing surfaces designed to create a secure metal-to-metal seal when properly assembled.
The -6AN connection uses 9/16-18 UNF threads.
Unlike tapered pipe fittings, AN flare connections seal at the flare surface rather than through the threads.
Do not apply PTFE tape or thread sealant to the AN flare connections.
1/8″ NPT Pressure Gauge Port
The auxiliary port uses 1/8″ NPT tapered pipe threads. Choosing the right performance fuel pump is crucial to any build, learn all about it using our DIY guide.
NPT connections rely on tapered thread engagement and an appropriate compatible thread sealant to create a leak-resistant connection.
Use a fuel-compatible liquid thread sealant approved for the application. Avoid excessive sealant, which can enter the fuel system or obstruct a pressure sensor.
EVIL ENERGY 6AN Fuel Pressure Take-Off Fitting Specifications
| Specification | Details |
|---|---|
| Manufacturer | EVIL ENERGY |
| Product type | Inline Fuel Pressure Take-Off Adapter |
| Male connection | -6AN |
| Female connection | -6AN |
| AN thread size | 9/16-18 UNF |
| AN sealing geometry | 37-degree flare |
| Auxiliary gauge port | 1/8″ NPT female |
| NPT sealing | Tapered pipe thread with suitable sealant |
| Material | 6061-T6 aluminum alloy |
| Maximum advertised working pressure | 1,500 PSI |
| Working temperature | -40°F to 250°F |
| Installation | Universal custom fuel system |
| Typical applications | Fuel pressure gauges, sensors, transducers |
What Vehicles Does This EVIL ENERGY 6AN Fitting Fit?
This is a universal -6AN fuel system adapter, not a direct-fit factory replacement.
It can be used in properly configured aftermarket fuel systems on a wide range of performance vehicles.
Common custom applications include:
| Vehicle / Engine Platform | Potential Application |
|---|---|
| Chevrolet Camaro / Corvette LS | Aftermarket fuel pressure monitoring |
| Ford Mustang 5.0L Coyote | Custom -6AN fuel plumbing |
| Honda Civic / Acura Integra | Turbocharged fuel system upgrades |
| Nissan 240SX SR20DET / KA24 | Fuel pressure gauge or sensor installation |
| Toyota Supra 2JZ | Aftermarket fuel rail plumbing |
| Lexus IS300 2JZ-GE | Custom fuel supply monitoring |
| Mitsubishi Lancer Evolution | Performance fuel system diagnostics |
| Subaru WRX / STI | Modified fuel delivery systems |
Vehicle compatibility depends on the installed fuel system and available -6AN connections. Factory fuel rails and OEM quick-connect fuel lines may require additional adapters.
How to Install a 6AN Fuel Pressure Take-Off Fitting
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Relieve fuel system pressure according to the vehicle manufacturer’s service procedure.
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Disconnect the battery and work in a well-ventilated area away from ignition sources.
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Identify an appropriate -6AN connection where fuel pressure should be measured.
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Install the adapter between compatible male and female AN connections, verifying correct flare engagement.
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Install the fuel pressure gauge or sensor into the 1/8″ NPT port using suitable fuel-compatible thread sealant.
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Tighten fittings according to the component manufacturers’ specifications without overtightening.
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Prime the fuel system and inspect all connections for leaks before starting the engine.
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Verify fuel pressure readings against the vehicle’s expected operating specifications.
For additional information about building custom fuel plumbing, or to learn about fuel pressure regulator installation and adjustment check out our guide.
Why Fuel Pressure Monitoring Matters
A fuel pressure gauge or sensor can help identify problems such as inadequate fuel pump delivery, restricted filters, faulty regulators, and pressure loss under high engine demand.
For turbocharged and supercharged engines, monitoring fuel pressure under boost can be particularly valuable.
This EVIL ENERGY fitting offers a straightforward way to add that monitoring capability to a compatible -6AN fuel system. Want to convert to E85? Check out our E85 conversion guide here.
Buy the EVIL ENERGY 6AN Fuel Pressure Take-Off Fitting at Pro Street Online
Add convenient fuel pressure monitoring to your custom fuel system with the EVIL ENERGY 6AN Male to Female Fuel Pressure Take-Off Fitting with 1/8″ NPT Gauge Port.
Its compact design, precision AN flare connections, durable aluminum construction, and universal aftermarket compatibility make it a practical addition to fuel system upgrades, E85 conversions, and performance engine builds.
Explore more fuel system fittings and performance components at Pro Street Online
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