Designed to achieve precise pressure regulator adjustments, these kits are for 1986-93 Ford 5.0L applications. With a black, silver (machined), carbon fiber-look, or white face, each liquid-filled gauge is encased in stainless steel, displays 0-100 psi, and has a JEGS exclusive 1-pc fitting that connects to the Schrader valve on factory EFI fuel rails.