Available to Order
Not sure which one? Ask us to confirm fitment first →For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. Outside the UK, shipping is shown at checkout and local customs and taxes remain your responsibility.
Some products are made to order, imported or custom built. If timing matters, contact us before ordering and we will confirm the expected delivery timeframe.
Send the vehicle, engine and current setup if you want us to confirm the exact application before checkout.
| Manufacturer | Stanadyne Inc (supplied by Nostrum High Performance) |
|---|---|
| Product Type | Bare high pressure fuel pump core |
| SKU | H116-1607 |
| Piston Diameter | 10.5 mm |
| Max Piston Travel | 10 mm (TDC-BDC) |
| Max Operating Pressure | 250 bar (25 MPa / 3636 psi) |
| Displaced Flow Per Cam Revolution | 1558.6 mm³ (6 mm stroke, 3 lobe) |
| High Pressure Fitting | M14x1 male thread with inner female cone |
| Low Pressure Fitting | 3/8 inch SAE quick connect male |
| Comparable Outline | GM LT1 HPFP (12697966, 12625817) |
| Included Items | Pump core only |
| Minimum Order Quantity | 6 pumps (shop and installer supply) |
This is a bare Stanadyne 1050-250 high pressure fuel pump core - the pump itself, with no engine installation accessories or hardware in the box. It runs a 10.5 mm piston and holds 250 bar sustained rail pressure, against the 180 bar standard rating of a production GM LT1 pump, which puts it level with GM's LT4 pump on pressure while keeping an outline comparable to the LT1 unit. Nostrum supplies these cores for shop and installer use in minimum quantities of six: a component for a fuel system you are specifying, not a weekend bolt-on.
Rail pressure is what lets a direct injector empty itself in the time it has, so the pump's ceiling becomes the calibration's ceiling. A production LT1 pump is rated to 180 bar. This core holds 250 bar (25 MPa, 3636 psi) with a 10.5 mm piston and 10 mm of maximum piston travel, displacing 1558.6 mm³ per cam revolution on a three lobe cam, in an outline close to the GM LT1 pump Nostrum identifies as 12697966 and 12625817.
Everything except the pump. The high pressure side is an M14x1 male thread with an inner female cone and the low pressure side a 3/8 inch SAE quick connect male fitting, so lines, seals, drive hardware and mounting parts are all specified around those. Nostrum expects LT-based installs to take their installation accessories from GM parts sources.
For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. For customers outside the UK, local customs and taxes remain your responsibility, and shipping is shown at checkout. If a shipping option is not available, email us and we will prepare a tailored quote.
Many of the products we sell are made to order, imported or custom built, so a lead time may apply. If you need a part urgently, contact us before ordering and we will confirm the expected delivery timeframe and process.
No. It is the bare pump. Fittings, lines, seals, drive parts and mounting hardware are all sourced separately.
The first figure identifies the flow capacity class, tied here to the 10.5 mm piston; the second is the maximum working pressure in bar. So a 1050-250 is the 10.5 mm core rated to 250 bar.
Same 250 bar rating, larger piston, different low pressure inlet - see the Stanadyne 1150-250 core. For a complete vehicle kit, try the high pressure fuel pump range.
Check dimensions, mounting points, clearance and any wiring or hose requirements against your setup before ordering.
Send us your vehicle, year, current setup and any fitting date, event, trip or deadline before ordering. We will help check fitment, product choice and timing.
