Brand new 100mm pistons for Ducati 1000 and 1100 motors- Gives 1123cc with stock 71.5 mm stroke. Easy big bore kit for 1000 and 1100ds motors. . These are brand new pistons that work great with air cooled Ducatis. Bruce Meyers/Meyers Performance Design made by Mahle. Price includes TWO PISTONS, rings, wrist pins and circlips. These work great and usually produce significant torque and horsepower gain over stock pistons.