If the factory addressed the powerband of these cars and smoothed them out as most owners end up doing via aftermarket headers, I think they would sit at a great place out of the box.
It wouldn't change the peak power numbers much but it does so much for the torque below the curve. Really that's where I'm starting to notice the small delay due to the torque dip exiting corners in second gear. It makes the car extremely predictable, but I'd like a bit more punch and linear feel.
Beyond that I think the car as is could handle near 200whp without much extra modification to the rest of the car. Especially if you offer existing options cross platform like the brembo brake package on the BRZ for those who want to track/auto-x.
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