Sparex source: https://us.sparex.com/piston-standard-40409.html Product: Piston (standard) - Sparex S.40409 SKU: S.40409 Listing note: Piston Length mm: 120.65mmCompression Height: 69.92mmBore Ø: 98.48mmBowl Depth: 20.26mmChamber Ø: 61.15mmPin Ø: 34.93mmNo. of Rings: 5 Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.