The AEM 1000 PSIg stainless sensor kit includes a stainless-steel sensor body with 1/8-inch NPT male thread, connector and pins, plus a 1/8-inch NPT to -4 AN adapter. Gauge-style PSIg sensors read pressure above atmospheric and are commonly used for oil, fuel, brake and nitrous pressure references. AEM states these stainless sensors are accurate to within 1% of full scale and feature sealed housings.
AEM 1000 PSIg Stainless Sensor Kit - 1/8in NPT Male Thread to -4 Adapter