Auto Meter 3827 GS 2-1/16" 0-100 PSI Oil Pressure Gauge Modern green LED through-the-dial lighting provides clear visibility during nighttime use 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system Gauge kit includes 1/8 NPT pressure sender, 1/4 NPT adapter, and detailed instructions for installation Auto Meters race proven air-core electric instruments provide quick and accurate readings while keeping hazardous fluids outside of the vehicle