Passenger Side Engine Piston – GM (12654416)

Passenger Side Engine Piston 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 Side Engine Piston 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.

This Side Engine Piston is listed under part number 12654416, filed under Pistons, Rings & Cylinders. If the original number is unreadable, send us the VIN and we will confirm the reference before dispatch.

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

This listing is specifically for the passenger (right-hand) side; the opposite side is a separate part number.