Note:  Piston rings are not included, unless otherwise noted.  On notched pistons, notch goes toward the flywheel.

Our pistons are manufactured by a leading piston maker.  All Stens brand pistons, except Lawn-Boy, are coated for reduced cylinder scuffing and are cam ground to compensate for thermal expansion.  Our pistons and rings are made to exact engine specifications with closer tolerances for precise fit.