ERC20 vs BEP20: Clear Guide for Token Standards BSEtec Torque Solution PNP Speed Density Kit (Aluminum Bung). Torque Solution PNP Speed Density Adapter Harness w IAT Sensor and Aluminum Weld Bung Applications: Subaru WRX 2008 2014, STI 2008 2021 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 TMIC (choose location and mark TMIC before removing it) or on your FMIC upper charge pipe right before the throttle body. Plug and Play Adapter Harness Direct Fit Waterproof Connectors 39" Length High Temp Wire Loom Fast Response IAT Sensor Aluminum IAT Weld On Bung 1 Year Warranty Includes: Torque Solution GM Style IAT Sensor Torque Solution IAT Speed Density Pigtail Harness Torque Solution Weld Bung: 3 8" ( 18) NPT Female Aluminum **Protune required to run a speed density setup. Fits: Subaru WRX 2008 2014 (USDM JDM) Subaru WRX STi 2008+ (USDM JDM)