4AN to 4AN O-Ring Port Adapter Black Male Male

The 4AN to 4AN O-Ring Port Adapter Black Male Male is a crucial fitting designed for custom fuel, oil, coolant, and hydraulic line systems in high-performance vehicles and engine builds. Manufactured by REDHORSE PERFORMANCE, this adapter provides a direct connection between two male 4AN ports, allowing for a streamlined installation that avoids the bulkiness of elbow fittings.

This adapter features dual 4AN male threads with integrated O-ring seals that compress against port surfaces, ensuring a Class 1 fuel-system-rated, vibration-resistant seal without the need for additional thread sealants. Constructed from black anodized aluminum, it is both lightweight and resistant to corrosion, making it ideal for performance applications. The O-ring design effectively accommodates minor surface irregularities, enhancing the reliability of the connection.

Ideal for those building custom fuel rail systems or upgrading cooling lines on turbocharged engines, this male-to-male adapter is a compact solution that minimizes pressure loss and preserves flow diameter. Whether for carbureted engines, EFI conversions, or auxiliary cooling systems, this adapter ensures optimal fuel delivery where every PSI and GPM is critical.