To determine which ring set set you need, you need to know the size and style.

Size

Turn the piston upside-down and measure the width of the very bottom of the skirt.
Take the measurement 90° from the wrist pin hole.

Style

Measure each ring groove with a set of calipers.

Based on the 3 groove sizes, the style would be:

  • .039", .047", .110" - XC/GNH
  • .059", .059", .110" - XN
  • .039", .039", .079" - XG