the old piston is def a high comp not sure if its a wiseco tho as i've used a wossner high comp one in mine.
the new piston is an oe spec part so it should be fine, but it wont be as good as the old one for performance.
did it damage the barrel cos if i took the head of an engine and saw a high comp piston i think i'd have just got a set of rings for it.
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