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Subaru engines back then could so the same. The old closed deck STi blocks were monsters. It isn't because engines were built to be stronger out of any desire for performance; it's that materials testing and production methods weren't anywhere near as developed as they are today, so everything was overbuilt just to be sure. Car manufacturers are in business to make money, so if they can cut materials by having their 200hp engine be built lighter to hold 250hp instead of 600hp, they spend less and make more.
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