If your looking to purchase an aftermarket Fast Acting Air Temperature Sensor this is what we recommend. These sensors are non-polarity specific so it does not matter what wire goes to each side. These senors require sensor ground from the ECU and the signal input wire for what ever temperature you are trying to read. 

Sizes available:

• 3/8" - 18 NPTF
• M14 x 1.5

What is included?

• Delphi Temperature Sensor
• Connector kit 

Adaptronic Users:

• In the software Eugene with the basemap loaded Select the tab Inputs > Temperature Sensor - Air Temp Sensor change the "sensor type" to Delco. No Pull-Up resistor is needed since any one of the 4 temperature inputs has it built in. 
• Please refer to the wiring guide located under the home tab in Eugene. You can access this by connecting to the ECU you have purchased or download the Eugene software along with the basemap provided for each ECU