The Cummins 3649935 is a genuine cylinder head for the QSK50 diesel engine. G Service Power has 16 units in UK stock, new surplus, at £2,000 each excl. VAT, ready for next-day worldwide dispatch. Cummins now lists 5581144 in its place. Call +44 7951 632187.
| Part number (MPN) | 3649935 |
|---|---|
| Manufacturer | Cummins |
| Product | QSK50 Cylinder Head |
| Component | Cylinder head |
| 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 | £2,000 ex works UK, excl. VAT |
| Reference | SL-3649935 |
The Cummins 3649935 fits Cummins QSK50. Related part numbers: 5581144 (superseded by, Cummins).
| Make | Model | Notes |
|---|---|---|
| Cummins | QSK50 | QSK50, per our stock list |
| Part number | Brand | Relation | Notes |
|---|---|---|---|
| 5581144 | Cummins | Superseded by |
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 cylinder head for the QSK50 diesel engine, part number 3649935. The cylinder head closes the top of the cylinder and carries the intake and exhaust valves, with their springs and guides, and the injector. The engine has a separate head for each cylinder, 16 in all, so one damaged head can be replaced on its own; the number cast on your head and your ESN settle which one you need.
Cummins has since superseded 3649935 with 5581144. The part in stock carries 3649935, and we confirm that it suits your engine before you order. 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 £2,000 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 | 3649935 |
|---|---|
| Engine model | Cummins QSK50 |