9. To wire the IAT, you need to splice into two of these wires and solder them to the two wires coming from the new sensor. Attach the connector that comes with IAT Relocation kit, it will clip onto the IAT sensor and have two black wires coming from it.
10. Cut the GREY/RED and GREY wires from the MAF. Make sure to leave about 2-3” of wire on the MAF side in case you ever need to solder the wires back together at a later date. These two wires are the signal wires for the IAT located on the MAF sensor. What we will do is take the two black wires and connect them to the GREY/RED and GREY wires we just cut. There are only two GREY wires on this sensor but if you are still confused, the two wires you want are in pins #1 and #2, which are all the way to one side of the sensor. In the picture above, note the orientation of the red tab (up). The two wires we want to cut are the two on the right of the picture.
11. Strip the ends of the two black wires from the IAT sensor and the GREY/RED and GREY wire. Ensure that you are connecting your IAT sensor to the harness side of the wires. This means, don’t solder your IAT sensor to the MAF sensor. You need to solder it to the wires that go into the loom (and eventually to your ECU).
12. See below for a close up of the GREY/RED and GREY wires. IGNORE the other wires in the pictures. They were used during a Whipple supercharger install. If you are installing a Whipple supercharger while doing this, it’s easy to do this step when you extend the MAF wires as per Whipple’s instructions.