Piston Compression Lower Ring – GM (97385931)

Piston Compression Lower Ring is one of the pistons that converts combustion pressure into motion. Ring land dimensions and skirt coating are specific to the build, not to the displacement.

Replace the Piston Compression Ring during any rebuild that has the head off, and always when the bore shows vertical scoring. Piston-to-wall clearance is set by measurement, not by the part number alone.

Reference number for the Piston Compression Ring: 97385931. It is filed under Pistons, Rings & Cylinders, and it is the number that has to match the part coming off the vehicle.

Genuine GM supplied for this Piston Compression Ring, with the engineering number unchanged from the factory reference stamped on the original.

This is the lower unit in the assembly; confirm the location on your vehicle before ordering.