Torque Solution Plug & Play Speed Density Kit (Stainless Bung) for 08-14 Subaru WRX / 08-21 Subaru STI - TS-WH-499PSTorque Solution PNP Speed Density Adapter Harness w IAT Sensor and Stainless Steel Weld Bung Description: Torque Solution PNP Speed Density Kit allows you to easily switch from MAF setup to Speed Density without having to hack up your OEM harness. Our adapter harness makes the kit a direct plug and play setup with no wire cutting or splicing required!! Requires the provided bung for the IAT sensor to be welded either on the throttle body side of your