H116CP vs H405CP

rumblefish360 said

The 116's are a Hyperutecic piston.
The 405's are regular cast.

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I believe they're both Hyperutecic, the description on the Federal-Mogul website is the same and Summit seems to think they are: https://www.summitracing.com/parts/SLP-H405CP/

H405CP


H116CP