CB Performance Lightweight Wrist Pins redcuce reciprocating weight by a total of 92.8 grams. This reduces bearing loads for longer bearing life and reduced friction. Less reciprocating weight means more horsepower! CB Performance Lightweight wrist pins are manufactured from L13 Tool Steel and are precision taper ground to insure that each wrist pin in identical in weight. They are manufactured to replace wrist pins in Mahle Pistons 88mm thru 94mm.