Serious racers know that optimum nitrous system performance is generated when nitrous bottle pressure is maintained between 900-1000 psi. To monitor this accurately, ZEX™ has just released a liquid filled gauge option for our popular nitrous pressure gauge kit. The gauge offered in this kit is not only more accurate, but the liquid filling helps protect the gauge’s delicate internal components from severe vibration, commonly found in race cars and serious street/strip type vehicles.