One of the most requested line additions in AutoMeter history, this Digital Stepper Motor Exhaust Pressure Gauge has been engineered to the highest standards of accuracy and durability. Precisely monitor your exhaust backpressure to maximize power and efficiency and ensure turbo longevity. Also ideal for cam tuning, includes a highly advanced 1/8? NPT Pressure Transducer, install kit and wiring harness for ease of installation. Data Logging is also possible thanks to an analog .5 - 4.5v output. An optional particulate filter is also available for enhanced sensor lifespan.