34: Shift Kit
That same driver was stopped again a few months later, this time because of his shift kit. The officer was confused when they saw that it was an automatic. The driver went through a wet patch in the road and that caused the tires to chirp. The officer on this stop was a bit more understanding than the last one (via Reddit).
The driver got off with a warning and there was no paint damage to the car this time. Needless to say, it often depends on the mood of the officer you encounter.