I had a set made by ARIAS. High compression, 9.5:1 CNC'd dome. NOT Cheap. Had to send them molds of combustion chambers,both INT/EXH & EXH/INT. They have shorter skirts, modern narrow three rings and much lighter than stock. Beautiful pistons, minimal slap when cold, my motor runs great. Probably good for an extra 40 HP alone. Did I say they weren't cheap?
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