Omni Power is proud to offer thier 4 bar plug and play speed density conversion harness for the Nissan R35 GTR. This kit includes 4 bar t-map sensor, plus as well as two 4 bar GTR map sensor along with a OE looking wire harness. After installation, your GTR will take air temperature readings from the upper intercooler pipe rather than the factory MAF housing. MAP Sensor calibration required. What separates their kit from others on the market is that this kit comes equipped with a 4 bar t-map sensor which has an intake air temperature built in to the sensor. The Omni 4 bar t-map is produced in house and uses the same technology that goes in to their existing map sensor line. Please note the picture shows the standard spec kit but our kit adds the additional needed 4 bar map sensor to make everything work properly.