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I'm just used to hearing to old engine builders tale of sharp edges in combustion chamber = detonation prone motor. I'd like to know if that a bunch of bull or true that all. And for what it's worth, wiseco pistons are highly used in motorcycle racing, and take one hell of a beating.
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2007 Mazda 3 hatch
1972 Porsche 914 roller with plenty of holes to fix 
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