HOPE 001- Airjack Exhuast Valve The airjack exhaust valve allows for noticeably quicker pitstops by allowing the airjacks on the car to fall faster. Upon releasing the pressure from the airjack system, the exhaust valve senses this drop in line pressure and opens its internal high-flow valve, thus letting the airjacks to drop significantly faster. Aerospace aluminium 6061-T6 fittings make for motorsport-ready JIC (-6) fittings on both inlet and outlet. Supplied dowdy seals eliminate air leaks.Recommended usage is one exhaust valve per airjack. Suitable for all airjacks with JIC (-6) fittings and without an integral exhaust valve.