Know the car before changing it
Inspect tires, alignment, brakes, fluids and previous modifications. Establish how much road versus track use the car will see.
Like the GR86, the BRZ responds best to a deliberate goal: driver feel, grip, track consistency, sound or a carefully engineered power route.
The right first purchase depends on the condition of your exact car. Use these as decision stages, not a universal parts list.
Inspect tires, alignment, brakes, fluids and previous modifications. Establish how much road versus track use the car will see.
Alignment, maintenance, touch points or a targeted brake/driver-feel change can be more rewarding than headline parts.
Build wheel/tire/alignment or suspension as a matched package, preserving usable travel and road comfort.
Once the foundation is healthy, use the MaxAMod planner to allocate the next stage around the goal you actually care about instead of buying interim parts twice.
The same Subaru BRZ should not get the same recommendations for every owner.
Fitment and strategy depend on details a generic product listing may not understand.
Extreme lowering, oversized wheels and power mods bought without a complete engine-specific route.