Autometer Ultra-Lite Gauge Rail Press (RAM 6.7L) 2-1/16in 30Kpsi Stepper MotorUltra High Pressures In Modern Direct Injected Diesel Applications Require Precise Monitoring To Assure The Longevity And Power Output Of Your Engine. Using Autometers Advanced Digital Stepper Motor Drive, This Gauge Provide The Most Accurate Possible Reading, Professional Grade Reliability And Smooth Pointer Movement. Connects Directly To Your Factory Sensor With An Included Wiring Harness. Installation Instructions This Part Fits: Year Make Model