This is an 95mm stock size throttle body for the GenV LT5 Engine.
Tuning is required when using this on the LT4, LT1, and L86 engines and is not a direct bolt-on requiring porting of the stock intake, an adapter plate, or an MSD Atomic intake manifold PN: 2700.
It is a genuine gm piece
Haven’t installed yet, product looks to be nice quality!