Piston rings fits: CATERPILLAR 16G, 245, 621B, 631D, 633D, 637D, 639D, 641B, 651B, 651E, 657, 657B, 657E, 666, 666B, 768C, 769C, 772, 772 B, 773 B, 776, 777, 824C, 825, 825C, 826C, 834B, 834U. Product code G08D1S.
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