Straight Adapter Fitting ; Size: -3AN x 1/8in NPT

The Vibrant Performance Straight Adapter Fitting in -3AN x 1/8in NPT is an essential component for anyone building or modifying fuel, coolant, or brake system plumbing on modern performance vehicles. This adapter bridges two industry-standard connection types—AN (Army-Navy) fittings and NPT (National Pipe Thread) ports—allowing you to integrate aftermarket fuel rails, turbo coolant lines, and custom brake proportioning systems into factory or upgraded engine bays.

Constructed from high-quality aluminum with an anodized finish, the -3AN x 1/8in NPT fitting delivers reliable corrosion resistance and durability under both high-pressure fuel delivery and coolant circulation. The straight design (as opposed to 45° or 90° variants) maintains consistent flow characteristics and simplifies installation in tight engine compartments where hose routing demands a direct path.

Mechanics and engine builders working on performance vehicles will find this fitting beneficial for various applications, including fuel systems, coolant lines, and brake circuits. The -3AN connection accepts standard AN hose, while the 1/8in NPT port threads directly into factory sensor bungs, cooler ports, or manifold taps without the need for additional adapters.