The Cummins 2891821 is a genuine piston ring, intermediate for the QSK50 diesel engine. G Service Power has 16 units in UK stock, new surplus, at £120 each excl. VAT, ready for next-day worldwide dispatch. Call +44 7951 632187.
| Part number (MPN) | 2891821 |
|---|---|
| Manufacturer | Cummins |
| Product | QSK50 Intermediate Piston Ring |
| Component | Piston ring, intermediate |
| Quantity available | 16 units |
| Stock list date | 6 November 2026 |
| Location | UK — ready to ship worldwide |
| Condition | New surplus |
| Availability | In stock — next-day worldwide dispatch |
| Price | £120 ex works UK, excl. VAT |
| Reference | SL-2891821 |
The Cummins 2891821 fits Cummins QSK50.
| Make | Model | Notes |
|---|---|---|
| Cummins | QSK50 | QSK50, per our stock list |
Our stock list gives this number for the QSK50 without naming the build, so confirm it by your engine serial number. Fitment and interchange data is compiled from manufacturer catalogues and cross-reference listings and can change at engine serial-number breaks. Quote your engine serial number and existing part number when you call and we will confirm before dispatch.
Genuine Cummins piston ring, intermediate for the QSK50 diesel engine, part number 2891821. The intermediate piston ring sits below the top ring, backs up its gas seal and helps scrape oil down the liner. Rings are renewed as a set at an overhaul: top, intermediate and oil ring for each piston.
Our stock list gives this number for the QSK50 but not the build it fits, so send your engine serial number (ESN) and the number on your old part and we confirm the match.
Condition: new surplus, meaning a genuine part bought for a project or a fleet that has not been run in operational service. 16 units available at £120 each plus VAT. Please confirm the part number against your engine serial number before ordering. In UK stock — call +44 7951 632187 or message on WhatsApp for shipping and availability.
Compatibility: fits Cummins QSK50 — the full list of engines and interchangeable part numbers is on the . Confirm against your engine serial number before ordering, or call us and we will check it with you.
For sale from UK stock. Quote any of these references when you call.
| Part number | 2891821 |
|---|---|
| Engine model | Cummins QSK50 |