Interstate-McBee M-3958645 Cylinder Head Gasket for Cummins 5.9L Inline-6 Diesel - New

Interstate-McBee M-3958645 multi-layer steel cylinder head gasket for inline 6-cylinder diesel service. Six-bore MLS design with integral fire-ring stoppers and full coolant, oil, and pushrod port pattern.

Application: Probable Cummins 5.9L 24-valve inline-6 (B-series / ISB / QSB family) based on the printed M-3958645 number. Exact engine model, CPL, and required gasket thickness grade are not verified — Cummins B-series head gaskets come in more than one thickness selected by piston protrusion, so verify before ordering.

Condition: New / NOS. Unused and still in its original poly sleeve. Sealing beads and fire rings are crisp, with no crushing, creasing, or corrosion. Light dust on the outer bag only. Sold as a single gasket — no head bolts or additional gaskets included.

Ships flat with stiffeners to protect the sealing surfaces.

Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase.