I had recently got a box of leftover grand national parts and was wondering if anybody knew what this electrical part is and what brand of header this is? Thanks in advance
That is a CAM FIX MODULE. That is designed to plug in line with the CAM sensor. Should the sensor fail, you will still be able to start the car. The module injects a false cam signal upon failed signal, and will allow you to start a car that would otherwise be stranded.