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How much NA power are they good for? .990 diameter, 4.25 bore, 515gr pistons. Will they be good at 750hp and 7000rpm?
 

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It's not optimum, but it'll work at that rpm and piston weight....

Do you know what kind of material the Pin is made of?
 

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Typically a bearing steel but JE and Wiseco use it I think. Probably others.
 
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