-4an Swivel Gauge Adapter

The -4AN Swivel Gauge Adapter from Nitrous Oxide Systems (NOS) is an essential fitting for any nitrous oxide system installation or modification. Designed for precision fuel and nitrous plumbing, this adapter serves as the critical link between your AN feed lines and dashboard-mounted pressure gauges, allowing real-time system monitoring during tuning and operation. Whether you're building a street-legal nitrous kit or upgrading an existing setup, this gauge adapter ensures reliable pressure readings that keep you informed of system performance and safety parameters.

Manufactured from aluminum and finished in vibrant blue anodizing, the -4AN Swivel Gauge Adapter combines durability with corrosion resistance—critical features in high-pressure nitrous applications where fluid exposure and temperature cycling can degrade inferior fittings. The swivel design eliminates stress on gauge lines and hose connections, reducing the risk of leaks at the critical gauge port interface. Its 4 AN female-to-male configuration with 1/8 inch NPT gauge port threading accommodates standard aftermarket pressure gauges, providing a secure, leak-free connection that withstands the demands of track and street use alike.

This adapter is ideal for nitrous oxide enthusiasts, drag racers, and performance shops building complete NOS systems from the ground up. Installation requires only basic hand tools and knowledge of AN fitting procedures—a straightforward task for any mechanic familiar with fuel system work. The compact, lightweight design (0.07 lbs) poses no packaging challenges, while the blue anodized finish integrates seamlessly into professional engine bays and custom fuel system layouts. Ensure compatibility with your specific gauge thread requirements before purchase to guarantee a perfect fit in your nitrous oxide system setup.