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Ive asked this a few times but never really got an answer. I see m3s m5s and 335s using aluminum crank pulley. Can this be an option for us, as aluminum is a lot less drag and frees up HP. Or is it not a good idea for diesels as for the vibration of the rods/crank vibration. I've had them in my Stangs and they worked great with KENNE BELL SC
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