HKS USA says the 'GT2 supercharger' kit for the new 2022+ Toyota GR86/Subaru BRZ "aims at around 350 HP."

In the email they also noted that "since the actual car has not been released yet and we have not been able to conduct our proper testing with the production vehicle, we cannot be definite." While that 350 HP rating isn't official yet, we don't have to look far to see how realistic it is.

The GT2 supercharger kit for the outgoing 86/BRZ generation is rated for up to 300 HP (with Fuel Upgrade Kit + Flash) and the big displacement bump 2022+ models received should go a long way to make that 50 HP increase possible, or even more.