Power Rev Racing (P2R) liquid filled nitrous psi gauges have a black background with bright red pointer for easy reading under the most demanding conditions. They are liquid filled, dampening vibrations, for accurate, steady readings. Gauges have a 1/8th male npt thread on back. Beautiful stainless steel case and acrylic lens. Important Note: This item is not vehicle specific. It is compatible with a wide range of applications and is therefore displayed on our site regardless of your vehicle selection. Please review the specifications and verify compatibility prior to placing your order.