#6 90 Stl Inverted Flare

The #6 90 Stl Inverted Flare hose end fitting by AEROQUIP is engineered for high-performance racing and modified vehicle fuel, oil, and coolant systems where reliability under extreme conditions is non-negotiable. This 6 AN 90-degree adapter connects PTFE racing hose to 5/8-18 inverted flare male ports, making it essential for custom fuel system builds, engine swaps, and competition vehicles that demand leak-proof connections and superior flow characteristics. Whether you're building a carbureted engine, upgrading a fuel injection system, or installing aftermarket cooling lines, this fitting delivers the precision fit and durability that serious enthusiasts and professional mechanics expect.

Constructed from steel with natural finish, the #6 90 Stl Inverted Flare features an inverted flare male end that seats securely in OEM and aftermarket manifolds without relying on crush washers, ensuring consistent performance across thermal cycles and vibration. The 90-degree angle reduces packaging constraints in tight engine bays, while the 6 AN hose size supports substantial flow rates for high-volume fuel pumps and cooling systems common in turbocharged, supercharged, and big-displacement builds. AEROQUIP's PTFE hose compatibility resists fuel degradation, withstands pressure spikes, and maintains integrity at temperatures where standard rubber fails—critical attributes for street performance and track applications.

This fitting suits mechanics and fabricators assembling custom fuel systems, engine conversions, and competition vehicles where stock fittings won't accommodate hose routing or pressure requirements. The inverted flare connection works with both carburetor fuel bowls and modern EFI fuel rails, provided they feature 5/8-18 female ports. Installation requires only hand-tightening—no special tools needed—though proper hose preparation and sizing ensure maximum seal integrity and system longevity. Verify hose inner diameter matches the 6 AN specification before assembly to guarantee optimal clamping force and eliminate the risk of leaks under load.