Turn a credit card on edge and imagine something two-thirds of its thickness. That tiny measurement represents how far Toyota was willing to go when making it easier for its 2027 GR86 to brake hard and turn into a corner. Toyota’s goal was to widen the chamfer on the shift interlock by just 0.5 mm, to make the fifth-to-fourth downshift smoother on the open road. It didn’t add any extra horsepower to the new GR86 or make any wholesale changes elsewhere. But it did spend engineering time on those minute measurements, to make its affordable sports car feel just right.
