Straight Fuel Line

The Holley Straight Fuel Line (HLY34-21) is a precision fuel system fitting designed for hot rodders, engine builders, and performance mechanics who require reliable fuel delivery in high-flow applications. This adapter connects the 5/8-18 inverted flare on fuel pumps and carburetors to a 3/8-inch hose barb inlet on rubber fuel lines, effectively eliminating kinks and flow restrictions.

Constructed from solid steel with a protective chrome finish, the Holley Straight Fuel Line adapter is built to resist corrosion while maintaining the necessary structural integrity for fuel system use. Its straight design minimizes turbulence and pressure drop, which is crucial for high-volume fuel pumps or gravity-feed systems, ensuring leak-free operation under sustained pressure.

Ideal for classic car restoration and custom fuel delivery setups, this Holley fitting provides a secure connection that prevents accidental disconnection during engine vibration or thermal cycling. Whether upgrading a carburetor fuel system or fabricating a new setup, this adapter is essential for achieving optimal performance.