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 | H116-1608 |
| Piston Diameter | 11.49 mm |
| Max Piston Travel | 10 mm (TDC-BDC) |
| Max Operating Pressure | 250 bar (25 MPa / 3636 psi) |
| Displaced Flow Per Cam Revolution | 1865.44 mm³ (6 mm stroke) |
| High Pressure Fitting | M14x1 male thread with inner female cone |
| Low Pressure Fitting | AN06 male |
| Comparable Dimensions | GM LT4 HPFP (12711668, 12694529) |
| Included Items | Pump core only |
| Minimum Order Quantity | 6 pumps (shop and installer supply) |
The Stanadyne 1150-250 is the larger of Nostrum's two 250 bar bare pump cores: an 11.49 mm piston displacing 1865.44 mm³ per cam revolution, rated to 250 bar (25 MPa, 3636 psi) - a much higher pressure rating than the production GM LT4 pump it shares its overall dimensions with. What sets it apart in practice is the low pressure inlet, an AN06 male thread instead of the LT4's 3/8 inch SAE quick connect, so the feed side is plumbed with industry-standard AN hardware. It arrives as a bare core with none of the hardware associated with engine installation, in minimum quantities of six for shop and installer use.
On a standard LT4 pump the low pressure feed arrives on a 3/8 inch SAE quick connect. This core replaces that with an AN06 male thread, and that is the single most important thing to notice before ordering. If your feed line is already AN, the pump drops into the plumbing you have. If it is a factory quick connect line, you need an adapter or a new line made up - a fabrication job to plan rather than discover on the bench.
Going from 10.5 mm to 11.49 mm of piston takes displaced flow per cam revolution from 1558.6 mm³ to 1865.44 mm³ at the same 6 mm stroke, so the pump moves more fuel per turn. That is what holds pressure steady at high injector demand instead of letting it fall away at the top end. Feed-side ripple is worth managing too, which is where the AN06 pulsation damper earns its place on an AN-plumbed system.
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.
Dimensions are similar to the stock LT4 unit, but the inlet is AN06 rather than a quick connect and no installation hardware is supplied. Expect to make up the feed side yourself.
More displaced flow per cam revolution at the same 250 bar rating, and an AN feed instead of a quick connect. The 1050-250 core is the choice if your plumbing is already SAE quick connect and demand is lower.
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.
