Expander AN -4 Female to -6 Male

The Expander AN -4 Female to -6 Male adapter is an essential hydraulic line fitting designed for custom automotive fuel systems, cooling loops, and high-performance engine modifications. This product is ideal for builders and mechanics who require precision in fuel delivery, oil circulation, and brake line routing.

This adapter effectively addresses the challenge of connecting different AN line sizes without necessitating a complete system redesign. It is constructed from aerospace-grade aluminum, which resists corrosion and maintains dimensional stability under the vibration and thermal cycling common in high-output engines. The precise AN-standard threads and sealing cone geometry ensure compatibility with standard AN fittings.

Engine builders, fabricators, and DIY enthusiasts will find this expander adapter particularly beneficial when tackling fuel system upgrades or custom installations. Its ability to transition from a -4 AN female port to a -6 AN male fitting allows for increased flow capacity where system demand requires it.