Piston Compression Upper Ring – GM (97385927)

Piston Compression Upper Ring is a reciprocating component that seals the combustion chamber. Clearance and surface finish decide whether it seals correctly, so the bore has to be measured before a replacement is chosen.

Replace the Piston Compression Ring when a leak-down test shows air escaping past the rings, when the skirt is scuffed, or when ring lands are cracked. Check the ring end gap in the bore it will run in.

The Piston Compression Ring in this listing carries part number 97385927 and sits in the Pistons, Rings & Cylinders category. The number stamped on the original part is the only reliable cross-reference.

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

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