#6 to 5/8-20 Carter/Edel brock Carb Adapter

The #6 to 5/8-20 Carter/Edelbrock carburetor adapter is a straight-fitting aluminum connector designed to bridge incompatible carburetor mounting threads on performance fuel systems. This AN-to-NPT adapter converts a 6 AN male thread to a 5/8-20 male thread, enabling seamless integration between aftermarket carburetor systems and custom fuel lines on modified engines. The red anodized finish provides both corrosion resistance and quick visual identification in engine bays where multiple adapters and fittings are common.

Precision machined from aluminum and anodized for durability, this adapter maintains the integrity of fuel delivery systems while accommodating thread-size transitions. The straight configuration eliminates unnecessary bends that can restrict flow, and the 6 AN size represents a standard metric fuel line dimension widely used in EFI conversions, turbo kits, and fuel pressure regulation setups. Weighing just 0.03 lbs and compact at 2.7 × 0.9 × 2.8 inches, the fitting installs easily in tight engine compartment spaces without interfering with surrounding components. Proper thread seal (using appropriate fuel-grade sealant tape or thread compound) ensures leak-free operation under pressure.

This adapter addresses a common challenge in custom fuel system builds: matching older Carter and Edelbrock carburetor ports with modern AN metric hose systems. Hot rodders, street machine builders, and fuel injection installers rely on precise thread-size adapters to maintain system compatibility without splicing or custom fabrication. Whether upgrading from stock carburetor plumbing to a modern fuel regulator, integrating a secondary fuel supply line, or adapting a carburetor to a different fuel manifold configuration, this fitting provides a direct, repeatable solution that holds pressure reliably through street and strip use.