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Old 10-08-2012, 09:08 AM
Barry_R Barry_R is offline
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The Mahle coatings are nice parts - they use a phosphate dip on all surfaces and a graphite skirt coating. Not many ceramics are used in OE pistons. You will see hard coat anodizing on some stuff - but its actually to prevent ring microwelding and just easier to not bother masking off the top.
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