Case hardened wrist pins utilize nitride coatings that produce a high performance, wear resistant wrist pin.. Coating wrist pins with a nitride coating is advantageous because it allows the desired surface hardness to be obtained without quenching and possibly distorting the pins.. This hardened surface is highly wear resistant and provides anti-galling properties..This item fits the following vehicle applications:for Yamaha YFM350 Raptor 2004-2011
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