Cummins engine piston kit 5473330 Series is designed for Cummins QSB6.7 and QSB7 diesel engines. This piston kit contains piston body, piston pin, snap rings and piston rings. It is a core combustion component that converts gas pressure into mechanical power, widely used in excavators, loaders, heavy trucks and generator sets.

Part numbers in this series:
5473330, 5493383, 5494041, 5579040, 5579122, 5579173, 5579190, 5579239, 5579276, 5579351, 5633375, 5633376, 5633385, 5633394, 5633406, 5633445, 5633449, 5633450, 5633466, 5633495, 5633519, 5633584, 5633587, 5633605, 5633606, 5633620, 5633622, 5633623

Fits: Cummins QSB6.7, QSB7 Diesel Engine
Position: Engine piston assembly

What you are ordering
Price is per piston kit. All part numbers are separate variants, please select the correct PN from variant options. These piston kits are not interchangeable. Different part numbers have different compression height, combustion chamber shape and piston crown design. Wrong selection will lead to power drop, knock and engine damage.

Specifications
Material: Aluminum alloy / forged steel
Surface treatment: Anodizing, anti-wear coating
Package: Neutral packing or wooden case
Kit composition: Piston, piston pin, circlips, piston ring set

When to replace
Replace the piston kit when piston cracking, crown melting, piston skirt scuffing, severe wear, or after engine seizure and overheating failure.

Fitting notes
Strictly confirm engine model and part number before ordering. Install piston ring gaps staggered correctly. Match with suitable cylinder liner and connecting rod bearing. Follow Cummins service manual for torque and clearance inspection after assembly. If you are not sure which PN matches your engine, send us engine serial number for confirmation.

Warranty and shipping
Covered by a 12-month warranty against manufacturing defects. Orders are dispatched within 3–7 business days; DHL / FedEx delivery takes 5–10 business days. Tracking number is sent as soon as the parcel leaves our warehouse.

Note: manufacturer names and part numbers are used for identification and cross-referencing only. We are an independent aftermarket supplier and are not affiliated with, or authorised by, the original manufacturer. Please verify the part number against your engine's parts catalogue before ordering — our team is happy to help if you send us your engine model or serial number.