i always forget the name but its some sort of balancer. a lot of people wonder about it, but it has its purpose. iirc, its either a balancer or a dampener, for vibration. or a counterweight.
2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.