Auto Meter 4315 Ultra-Lite Electric Fuel Level Gauge Traditional incandescent lighting illuminates around the perimeter of the dial Works with most Pre-1989 (Pre-1987 Mustang) Ford and most Chrysler 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system Gauge kit includes bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation Auto Meters race proven air-core electric instruments provide quick and accurate readings