The lower cylindrical portion of the piston which improves piston cooling performance is called

The lower cylindrical portion of the piston which improves piston cooling performance is called Correct Answer Piston skirt

The piston skirt is the cylindrical walls of a piston. During manufacture, the surface of the piston skirt is left slightly rough which helps retain lubrication.
The piston skirt acts as a guide as the piston goes up and down in the cylinder.
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