Attaching this sensor to Velox Lower Control Arm
 

In the 2017 86 models have this sensor that fastens to the stock rear driver side LCA by a 10mm bolt. It pivots on both ends. I've no idea what it actually "senses", but my guess would be vibrations of the LCA.

So, when upgrading to Velox LCA, there is no hole for this sensor to be secured to. I can curl it up and fasten it back to itself, but I feel like it was the way it was for a reason. If its important, I'll need to drill a tiny new hole into my new LCA.

I don't see in the manual for the LCA where they mention this sensor, or even see it on the car in the manual, so I'm assuming this is a new thing with 2017 models. I would hope Velox would not leave this out on purpose if it was a known feature to support when upgrading to their LCA.

99% sure we already had a thread about this exact thing. For this exact product.

I could be wrong, but I believe that its the auto level sensor for your headlights.
I also believe they sell an add on bracket that you need to connect the sensor to the LCA.

Oh wow. This car still surprises me at how amazing it is. Thanks fellas.