Why Upgrade to an Adjustable Fuel Pressure Regulator?

High-performance EFI systems require consistent fuel pressure to maintain proper injector operation, tuning stability, and safe air-fuel ratios. Factory regulators often struggle when horsepower, injector size, boost levels, or fuel pump capacity increase significantly.

An adjustable regulator allows builders to:

• Fine-tune fuel pressure
• Support larger injectors
• Stabilize fuel delivery under boost
• Improve tuning consistency
• Support high-horsepower applications

Basically, it keeps your fuel system from panicking at wide-open throttle.

【Features】- The EFI fuel pressure regulator is precision machined from 6061-T6 aluminum alloy and includes a 1/8 inch NPT instrument port, 1/8 inch NPT vacuum interface, two 10AN (ORB) feed ports and one 10AN (ORB) return port.

Features

• Adjustable fuel pressure range from 30–140 PSI
• High-flow 10AN bypass return design
• Integrated fuel pressure gauge included
• Lightweight billet aluminum construction
• Red anodized corrosion-resistant finish
• Precision diaphragm and spring control system
• Designed for EFI fuel systems
• Suitable for gasoline, E85, ethanol blends, methanol, and race fuel
• High-flow regulator body for performance applications

【Adjustable Range】- The pre-installed spring supports a pressure range of 30-80psi, even as the replacement spring supports a pressure range of 80-140psi. Adjust the set screw on most sensible to get the specified pressure, and change to the replacement spring if a higher pressure is wanted.

Common Applications

• Turbocharged EFI systems
• Supercharged builds
• LS swap fuel systems
• Return-style fuel setups
• Drift and drag race vehicles
• Standalone ECU systems
• E85 fuel systems
• High-horsepower street cars
• Motorsport fuel delivery systems

【Fuel Type】- Adjustable fuel pressure regulator compatible with gasoline,E85 and alcohol/ethanol, now not compatible with diesel fuel. (Nylon braided fuel line isn’t compatible with E85.)

Designed for High-Horsepower Fuel Delivery

The high-flow bypass return configuration allows the regulator to maintain stable fuel pressure even under aggressive load and elevated fuel demand. This is critical for turbocharged and boosted applications where fuel pressure consistency directly impacts engine safety and tuning performance.

Especially useful when your injectors flow enough fuel to qualify as irrigation equipment.

【Package Includes】- 1 x fuel pressure regulator, 1 x pressure gauge, 1 x replacement spring, 1 x AN10 ORB port plug, 1 x allen key, 1 x sealant tape, 3 x AN10 ORB to AN6 fitting, 3 x AN10 ORB to AN8 fittings, 3 x AN10 ORB to AN10 fittings.

Integrated Fuel Pressure Gauge

The included gauge allows quick visual fuel pressure monitoring during installation, tuning, and troubleshooting. Maintaining stable fuel pressure helps ensure accurate fueling under idle, cruise, boost, and wide-open throttle conditions.

Because “I think it has enough fuel” usually precedes expensive mechanical noises.

【Application】- The Evil energy fuel pressure regulator is suitable for so much vehicles’ electronic fuel injection systems and can take care of the engine’s fuel pressure at a specified value. (Note:when installing fuel regulator NPT pressure gauge port,please use thread sealant tape for sealing.Professional installation is highly really useful.)

Built for Modern Performance Fuels

Compatible with gasoline, E85, ethanol blends, methanol, and race fuels, this regulator is ideal for modern high-performance builds requiring ethanol-compatible fuel system hardware.

Which is important because E85-powered builds consume fuel with the efficiency of a V8 towing a mountain.

Clean Engine Bay Appearance

Beyond performance, the anodized red finish adds a professional motorsports-inspired appearance to custom engine bays. Combined with braided AN plumbing and aftermarket fuel rails, the regulator creates a clean and organized fuel system layout.

Translation: your engine bay finally looks as expensive as it actually became.

Why Choose EVIL ENERGY?

EVIL ENERGY has become a trusted choice for enthusiasts looking for affordable and dependable fuel system hardware, AN fittings, and EFI plumbing solutions. Their adjustable fuel pressure regulators offer reliable tuning flexibility, durable construction, and high-flow performance for both street and race applications.

Because lean conditions and melted pistons are terrible dyno results.