6AN Female Swivel To 1/4NPT Male Adapter STR

The 6AN Female Swivel to 1/4NPT Male Adapter STR from REDHORSE PERFORMANCE is a vital hydraulic and pneumatic fitting designed for custom fuel, coolant, and vacuum line installations in modified engines and aftermarket fuel systems. This adapter is essential for builders integrating modern fuel injection systems, nitrous oxide kits, turbo plumbing, and custom cooling loops into vehicles with different threading standards.

Featuring a 6AN female swivel connection that accepts standard -6 AN hose and fittings, the 1/4 NPT male end threads directly into NPT-ported components such as fuel rails and regulators. The swivel design allows for 360-degree rotation under load, which helps prevent hose kinking and reduces stress on crimp fittings during engine movement. Constructed from aluminum with precision-machined threading, this adapter ensures tight seals when used with appropriate thread sealants.

Mechanics and engine builders rely on this adapter when retrofitting forced-induction systems, custom fuel cell kits, or standalone EFI platforms into legacy vehicles. Its straight configuration minimizes installation footprint in tight engine bays, making it a practical choice for high-output applications where flexible, leak-free connections are crucial.