That's different. Look up the gentleman's agreement for why, but every Japanese car from that era had 276hp on paper. The supra had close to 320 as sold. The skyline had a marked boost controller hose that you could remove part of and turn up boost for more power. None of this was to sell a higher power variant using the same parts but software locked. It was all to secretly continue the horsepower war while publicly sticking to the agreed limits.

This was the whole point of the grease monkey scene starting back in the 50s. You take the car from the dealer, and then start adding, tweaking to get every last bit of power from it. Take a set of twin single barrel carbs off to be replaced with a single four barrel. Add a better set of manifolds. Add better __________. Once computers were introduced for air/fuel mixing, fuel injection, and any of the other things it can do, there have been shops that specialize in tuning them to max out performance. Just watch any show on your favorite streaming platform about building/enhancing cars.