The 3 Bar MAP Sensor Kit is essential for accurate engine management with boost applications over 14.7psi. High quality 3 Bar MAP Sensor will measure up to 29.7psi, where the OEM 2 Bar MAP Sensor will only measure up to 14.7psi. It is critical to provide accurate pressure information to your ECU to ensure proper air/fuel mixture and data logging. RIVA 3 Bar MAP Sensors mount directly in place of OEM sensor with stainless bracket and plugs directly into OEM wiring harness.