#4 to 1/8 NPT 90 Deg Gauge Adapter

The #4 to 1/8 NPT 90 Deg Gauge Adapter is a precision fitting engineered for marine fuel and pressure systems where reliable gauge installation is critical. Built by XRP-XTREME RACING PROD., this 90-degree adapter bridges AN #4 male connections to 1/8 inch NPT female ports, making it ideal for anglers and boaters who need to monitor engine performance on the water. Whether you're running a high-performance outboard or gauging fuel delivery on an inboard setup, this adapter ensures a secure, leak-free connection between your pressure gauge and the engine's sensing port.

Constructed from steel with a zinc oxide finish, the #4 to 1/8 NPT 90 Deg Gauge Adapter resists corrosion in saltwater and freshwater environments—essential protection for any gauge fitting exposed to marine spray and humidity. The 90-degree design allows for flush, space-efficient routing along engine blocks and fuel rails, preventing gauges from protruding into workspace or creating snag hazards in cramped engine compartments. The zinc oxide coating provides lasting durability without sacrificing the structural integrity of the AN #4 male thread or the NPT female port, ensuring tight seals that hold under the vibration and pressure cycling typical of marine engines.

Boaters upgrading fuel-pressure gauges, oil-pressure displays, or water-temperature sensors will find this adapter invaluable for custom installations where OEM ports don't align with aftermarket gauge locations. The compact dimensions (2.7 x 0.95 x 3.95 inches) and lightweight design (0.1 lbs) make it easy to route in tight spaces without adding bulk or vibration issues. For anyone serious about engine diagnostics or performance monitoring during offshore or freshwater runs, this gauge adapter delivers the reliability and corrosion resistance required for years of trouble-free service.