Earl's Performance Aluminum O-Ring Port Union Fittings

Earl's Performance Aluminum O-Ring Port Union Fittings are precision-machined AN adapters engineered for professional-grade fluid system plumbing in racing, performance, and custom applications. Built under Earl's trusted Ano-Tuff hard anodizing process — a military-spec coating that penetrates deep into the aluminum substrate — these fittings deliver superior wear and corrosion resistance that outlasts conventional anodized fittings.

Key Features:

• Ano-Tuff Military-Spec Hard Anodizing — The hard anodizing process penetrates the aluminum to create a surface that lasts twice as long as traditional anodizing finishes
• Precision-Machined 2024 Aluminum Construction — High-strength aluminum alloy provides lightweight durability for demanding performance environments
• O-Ring Port Design — Delivers leak-free, secure connections ideal for fuel pumps, fuel filters, regulators, oil circuits, and coolant systems
• Versatile Application Range — Suited for virtually any plumbing configuration, including custom and one-off performance builds
• Distinctive Appearance — Hard anodized finish delivers a professional, show-quality look in any engine bay
• Made in the USA — Manufactured to Earl's exacting quality standards with decades of motorsport heritage

Since 1955, Earl's Performance Products has been a cornerstone of the performance plumbing industry, pioneering the use of aircraft-grade fluid transfer technology in automotive and motorsport applications. Whether plumbing fuel systems, oil circuits, or cooling lines, Earl's O-Ring Port Union Fittings are engineered to perform flawlessly under high-pressure, high-vibration conditions — making them a trusted choice for professional race teams and serious performance enthusiasts alike. Available in multiple AN sizes and port configurations to suit any performance plumbing need.