Why Upgrade to an Adjustable Fuel Pressure Regulator?

EFI engines rely on consistent fuel pressure for proper injector operation, tuning stability, and safe air-fuel ratios. Once larger injectors, upgraded fuel pumps, boost, or ethanol fuels enter the equation, factory regulators often become inadequate.

An adjustable bypass regulator allows builders to:

• Fine-tune fuel pressure
• Improve tuning consistency
• Support larger injectors
• Stabilize fuel delivery under load
• Support turbocharged and high-performance applications

Translation: fewer lean conditions and fewer opportunities to ventilate the engine block.

[Application] fuel regulator are compatible for so much vehicle’s EFI system.

Features

• Adjustable fuel pressure range from 30–70 PSI
• 6AN bypass return configuration
• Designed for EFI fuel systems
• Lightweight billet aluminum construction
• Red anodized corrosion-resistant finish
• Precision diaphragm and spring control
• High-flow internal regulator design
• Compatible with gasoline, E85, ethanol blends, and race fuel
• Compact universal installation size

[Medium] bypass fuel pressure regulator compatible with gasoline,E85 and alcohol/ethanol, no longer compatible with diesel fuel. (Nylon braided fuel line isn’t compatible with E85.)

Compact and Universal Installation

The compact billet aluminum body allows easy mounting in tight engine bays while maintaining clean fuel line routing. The anodized red finish also adds a motorsports-inspired appearance to custom fuel system setups.

Translation: your fuel system finally looks as serious as your dyno goals.

[Adjustable Range] Adjustable fuel pressure: 30psi -70psi.Alter the set screw on best to get the specified pressure.

Common Applications

• Turbocharged EFI systems
• Return-style fuel setups
• LS swap fuel systems
• Honda K-series and B-series fuel upgrades
• Nissan SR and RB fuel systems
• Drift and drag race vehicles
• Standalone ECU applications
• E85 fuel systems
• High-performance street builds

[Note] The 6AN to M12x1.25 and 6AN to M14x1.5 fittings are for fuel rail use best, installation on fuel pressure regulator will lead to leaks. When putting in fuel regulator NPT pressure gauge port,please use thread sealant tape for sealing.

Designed for Stable Fuel Delivery

The bypass return design helps maintain consistent fuel pressure by continuously circulating excess fuel back to the tank. This improves fuel system stability while reducing pressure fluctuations during idle, boost, and wide-open throttle conditions.

Especially important when your fuel injectors now flow enough fuel to hydrate a football stadium.

[Package Includes] 1 x fuel pressure regulator, 1 x pressure gauge, 1 x Bracket, 2 x AN6 port plug, 4 x 6AN to 6AN ORB fitting, 1 x 6AN ORB to 6AN Barb fittings, 2 x 6AN to M fittings, 3 x 6AN Stainless Steel Braided CPE Fuel Line.

Perfect for Modern EFI Systems

Compatible with modern EFI fuel plumbing and AN hose systems, this regulator works well with upgraded fuel rails, braided fuel lines, aftermarket pumps, and standalone ECU tuning solutions.

Because once you upgrade one fuel system component, somehow you end up replacing the entire car.

Built for Performance Fuels

Compatible with gasoline, E85, ethanol blends, methanol, and race fuels, this regulator supports the increased demands of modern performance engines and aggressive tuning combinations.

Because E85-powered builds drink fuel with absolutely no respect for your wallet.

Why Choose EVIL ENERGY?

EVIL ENERGY has become a trusted choice among enthusiasts for affordable fuel system hardware, AN fittings, and performance plumbing components. Their adjustable EFI regulators offer reliable fuel pressure control, durable construction, and universal compatibility for both street-driven and race-focused applications.

Because fuel pressure problems tend to introduce themselves loudly and expensively.