Fuelab Universal EFI Adjustable Mini Fuel Pressure Regulator In-Line 25-90 psi 1 -6AN Inlet 1 -6AN Return Black

Fuelab Adjustable EFI Mini Fuel Pressure Regulator In-Line 25-90 psi -6AN Black | Precise Fuel Pressure Control | EFI Fuel Pressure Regulator

Overview

The Fuelab Adjustable EFI Mini Fuel Pressure Regulator is designed to provide precise fuel pressure control for a wide range of fuel-injected applications, including Subaru platforms and other performance vehicles. This compact regulator supports fuel pressures from 25 to 90 psi, making it ideal for EFI systems requiring consistent and adjustable fuel delivery. Its universal fitment and -6AN inlet and return ports allow for versatile installation in tight engine bays or custom fuel setups.

Engineered with a billet aluminum body anodized to military specifications (MIL-A-8625, Type II), this regulator combines durability with lightweight construction, weighing 50% less than Fuelab’s larger 515/525 series models. The fine thread pitch adjustment mechanism ensures smooth and accurate tuning of fuel pressure, while the included mounting bracket and stainless steel hardware simplify installation. Compatibility with gasoline, diesel, methanol, and ethanol fuels adds to its versatility for Subaru enthusiasts exploring various fuel types or forced induction upgrades.

For Subaru owners, maintaining stable fuel pressure is critical to achieving optimal engine performance and reliability, especially when upgrading to higher horsepower setups or alternative fuels. The Fuelab Mini Regulator’s compact size and precise adjustability help ensure consistent fuel delivery, reducing the risk of lean conditions or fuel starvation during spirited driving or track use. Its universal design also makes it a practical choice for custom fuel system builds on WRX, STI, BRZ, and other Subaru models.

Features & Specifications

This Fuelab Adjustable EFI Mini Fuel Pressure Regulator is engineered for universal EFI applications and features a compact in-line design with -6AN inlet and return ports. Constructed from billet aluminum with a military-grade anodized finish, it delivers precise fuel pressure control for Subaru enthusiasts seeking reliable and adjustable fuel system performance.

• Brand: Fuelab
• Product: Adjustable EFI Mini Fuel Pressure Regulator In-Line 25-90 psi -6AN Black
• Part Number: 54501-1
• Fitment: Universal
• Material: Billet Aluminum
• Finish: Black Anodized (MIL-A-8625, Type II)
• Construction: CNC Machined Billet with Fine Thread Pitch Adjustment
• Origin: Not Specified
• Fuel Compatibility: Gasoline, Diesel, Methanol, Ethanol
• Pressure Range: 25-90 psi (PSID)
• Inlet/Return Ports: Single -6AN Inlet / Single -6AN Return
• Gauge Port: 1/8 inch NPT with Plug
• Pressure Reference Port: 1/8 inch NPT with Barbed Fitting
• Weight: Approximately 50% lighter than Fuelab 515/525 Series
• Mounting: Versatile Bracket with Stainless Steel Hardware Included
• Warranty: Limited Lifetime Warranty

Key Benefits

• Performance: Precise fuel pressure adjustment ensures consistent fuel delivery for optimal engine tuning and power output.
• Durability: Billet aluminum construction with military-grade anodizing provides corrosion resistance and long-lasting reliability.
• Fitment: Compact, lightweight design fits easily in tight engine bays and limited space areas common in Subaru engine compartments.
• Versatility: Compatible with multiple fuel types including gasoline, diesel, methanol, and ethanol, supporting diverse Subaru builds.
• Adjustability: Fine thread pitch allows for smooth, precise pressure tuning to match specific fuel system requirements.
• Installation: Includes versatile mounting bracket and stainless steel hardware for secure and flexible mounting options.

What's Included

• 1× Fuelab Adjustable EFI Mini Fuel Pressure Regulator In-Line 25-90 psi -6AN Black
• 1× Versatile Mounting Bracket
• Stainless Steel Mounting Hardware
• 1/8 inch NPT Plug for Gauge Port
• Installation Instructions

Installation & Compatibility

The Fuelab Mini Fuel Pressure Regulator is designed for straightforward installation in most EFI fuel systems with -6AN fittings. Its compact size makes it ideal for tight engine bays, but professional installation is recommended to ensure proper fuel line routing and pressure adjustment. No special tools beyond standard fuel line wrenches are typically required. This regulator is universal and compatible with a wide range of Subaru models and other vehicles, but verifying fitment for your specific year and fuel system setup is advised. Tuning adjustments may be necessary to optimize fuel pressure for your engine management system and fuel pump capabilities.

• Professional Installation: Recommended
• Modifications Required: None, standard -6AN fuel line fittings required
• Verify Compatibility: Confirm fitment for your specific Subaru model and fuel system configuration

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