Feature●Traditional incandescent lighting illuminates around the perimeter of the dial●Auto Meter’s race proven mechanical instruments provide trusted accuracy while being simple to install●No electrical system required for gauge operation - compatible with every street or race vehicle●Gauge kit includes, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation●Gauge threaded for -4AN, allowing an easy installation into the nitrous systemDescription Bright anodized bezels, polished pointers, race proven movements and real carbon fiber dials set this series apart.