Me and my friend are doing the gsr swap on an ls integra. The engine was pulled out of another car and they just cut all of the wires. when we were disconnecting the cut wires one of the sensors broke, but i am not sure exactly what it is. It is located on the driver side of the engine under the intake manifold. It is a small switch and i am just trying to figure out what this is so i can get a replacement piece. sorry i dont have any pictures at this time, but i will try get some this weekend and post them up here. any info would be greatly appreciated. thanks

 

If its threaded in to the block itself right under intake manifold its your knock sensor.
Same thing happened to me a few weeks back with my swap.Be ready to get shafted
by Honda for a new one.It cost me $155 for a new knock sensor.