Hyper pistons have no business being in a serious performance engine, they were designed for mass produced low emission tight clearanced moderate output 100k mile warranty'd EFI daily driver computer controlled vehicles using knock sensors
(they're delicate)
Hyper pistons do not hold up to severe duty, period.
2618 alloy is nearly indestructible, uses larger clearances & expands more than 4032 which is more temp/dimensionally stable
I'd rather have a standard eutectic or slightly Hypo-eutectic piston than a Hyper
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