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-   -   Need help identifying 98MM pistons (http://forums.pelicanparts.com/911-engine-rebuilding-forum/887150-need-help-identifying-98mm-pistons.html)

KTL 05-31-2016 05:30 AM

That's the fattest area of the piston to remove material for lightening them. And since aluminum alloy is pretty light, you have to remove a sizeable area under the crown to have it add up to several grams.


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