Nitrous Express GaugesNitrous Express 15509 Flo-Thru Nitrous Pressure Gauge, -4 AN (0-1500 PSI)

Nitrous Express 15509 N20 FLO-THRU Pressure Gauges include a high accuracy nitrous pressure gauge and a billet aluminum manifold that has two 1/8 npt ports allowing you to connect the nitrous gauge as well as another 1/8 npt accessory in-line with a -4 AN line.