New old stock Speed-Pro piston ring set, part number R-9401-65. Box is shelf-worn but unopened. These are Federal-Mogul quality — perfect for a performance rebuild or stock restoration.

Check compatibility before purchase. Old-school machinist’s shelf find — if you know, you know.

Details:

• Brand: Speed-Pro (Federal-Mogul)

• Part #: R-9401-65

• Condition: New old stock (box shows shelf wear)

• Type: Piston ring set

• Application: Verify fitment for your specific engine build