This piston ring kit includes compression rings and oil control rings. It seals the combustion chamber, controls engine oil consumption, and transfers heat from piston to cylinder liner. Widely used for heavy-duty trucks, construction machinery, generator sets, marine and industrial diesel engines.

Part numbers: 4918294, 4955435, 4955436, 4955480, 4955641, 4955975, 4955976, 4959949, 4974319, 4974320, 4974321, 4974985, 4976251, 4976252, 4993960, 5267503, 5267504, 5267505, 5269330, 5294847, 5406061, 5482359, 5482361, 5493347, 5633496

Fits: Cummins series diesel engine
Position: Engine piston assembly

What you are ordering
Price is per piston ring set. All part numbers are separate variants, please select the correct PN from variant options. These piston ring sets are not interchangeable. Different part numbers have different bore diameter, ring thickness and surface treatment. Wrong selection will cause high oil consumption, insufficient compression and blow-by.

Specifications
Material: Cast iron / alloy steel
Surface treatment: Chrome plating, molybdenum spraying
Package: Neutral packing or branded packing
Set composition: Top compression ring, second compression ring, oil control ring

When to replace
Replace the piston ring set when you encounter excessive oil consumption, blow-by gas, power reduction, poor cylinder compression, or after cylinder liner scratch and piston damage.

Fitting notes
Strictly confirm engine model and part number before ordering. Ring gaps need to be staggered properly during installation. Follow Cummins service manual for installation clearance and 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.