Fuelab Diaphragm/O-Ring Kit for 515xx and 525xx Series Regulators, Standard Seat

Fuelab Diaphragm and O-Ring Kit For Use w/ 515xx & 525xx Series Regulators | Replacement Seals | Maintenance Kit

Overview

The Fuelab Diaphragm and O-Ring Kit is designed as a direct replacement service kit for Fuelab's 515xx, 525xx, 529xx, and 50101 series fuel pressure regulators. This kit is essential for maintaining optimal regulator performance by restoring proper sealing and diaphragm integrity, ensuring consistent fuel pressure control. It is ideal for Subaru enthusiasts and tuners who rely on Fuelab regulators for precise fuel delivery in their performance builds.

Engineered with precision and durability in mind, this kit includes high-quality diaphragms and O-rings that meet the exact specifications of the original components. Fuelab’s commitment to quality ensures that these replacement parts maintain the regulator’s reliability and longevity, preventing leaks and pressure inconsistencies that can affect engine performance.

For Subaru owners running aftermarket fuel systems or upgraded regulators, regular maintenance with genuine replacement parts like this kit is critical. Proper sealing and diaphragm function help sustain stable fuel pressure, which is vital for tuning accuracy and engine safety, especially under high boost or high-performance conditions.

Features & Specifications

This Fuelab Diaphragm and O-Ring Kit is engineered for universal fitment with Fuelab 515xx, 525xx, 529xx, and 50101 series regulators. Constructed from durable elastomer and precision materials, it delivers reliable sealing and diaphragm performance for Subaru enthusiasts seeking consistent fuel pressure regulation and maintenance ease.

• Brand: Fuelab
• Product: Diaphragm and O-Ring Kit For Use w/ 515xx & 525xx Series Regulators
• Part Number: 14601
• Fitment: Universal (Fuelab 515xx, 525xx, 529xx, 50101 series regulators)
• Material: High-grade elastomer and sealing compounds
• Finish: N/A
• Construction: Molded diaphragm and precision O-rings
• Origin: Not specified

Key Benefits

• Reliability: Restores proper sealing to prevent fuel leaks and pressure drops
• Durability: Made from high-quality materials designed to withstand fuel system stresses
• Fitment: Universal compatibility with multiple Fuelab regulator series for versatile use
• Maintenance: Enables cost-effective upkeep of fuel pressure regulators without full replacement
• Performance: Maintains consistent fuel pressure critical for tuning and engine safety
• Ease of Use: Straightforward replacement parts designed for quick service intervals

What's Included

• 1× Fuelab Diaphragm
• 1× Set of O-Rings compatible with 515xx, 525xx, 529xx, and 50101 series regulators

Installation & Compatibility

Installation of the Fuelab Diaphragm and O-Ring Kit is a maintenance-level task suitable for enthusiasts comfortable with fuel system servicing. Basic hand tools are required to disassemble the regulator housing and replace the diaphragm and seals. It is recommended to follow Fuelab’s service instructions carefully to ensure proper reassembly and sealing. This kit is universally compatible with Fuelab 515xx, 525xx, 529xx, and 50101 series regulators, making it a versatile choice for Subaru owners using these models.

• Professional Installation: Recommended for those unfamiliar with fuel system components
• Modifications Required: None
• Verify Compatibility: Confirm regulator model matches 515xx, 525xx, 529xx, or 50101 series before installation

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