Piston, Ring Set, Valve Guides & Intake Valve Seat Inserts for Mitsubishi S4L - New

New, never-installed aftermarket overhaul components labeled for the **Mitsubishi S4L** 4-cylinder diesel (78 mm bore) — the base engine behind several Westerbeke marine generator sets and many industrial/compact-equipment applications. Included and visible in the photos: piston(s) in individually labeled cartons, a piston ring set marked S4L 78*2.5H+2+4 STD (1 SET), 4 pc intake valve seat inserts, and 4 pc valve guides — all still in their original factory bags and boxes. Application: Mitsubishi S4L / Westerbeke S4L-based generator and industrial engines. Application not verified — sold by photographs, package labeling, and dimensions. Condition: New / NOS. No signs of installation, wear, or corrosion; light shelf wear and storage dust on the cartons. Not tested or trial-fitted. Packaging carries no OEM Mitsubishi or Westerbeke part number, so no OEM SKU is claimed and kit completeness is not warranted — please confirm the exact piece count you need. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase.