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And I could throw up a wall of text from people that know that says the exact opposite of everything you wrote. Can you find me proof of any lightweight pulley actually damaging an otherwise stock small displacement normally aspirated engine? Go for it, show actual proof these things can hurt the engine. I'll be waiting.
Seriously, engines are different, engine tech has advanced massively, why do people thinks stuff from even a decade ago is the same as it is now?
Lightened mass is desirable because it makes the car function better in every way possible. Pretty sure flywheels are necessary, but since I am not an automotive engineer and am not omniscient, I could be wrong.
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