{"product":{"id":11142677528918,"title":"Nostrum Stanadyne 1150-250 Bare HPFP Core, GM LT4 Outline, AN06 Inlet","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGen 5 LT builds already plumbed in AN hardware, where a quick connect inlet would be the odd fitting out\u003c\/li\u003e\n\u003cli\u003eEngine builders specifying the largest 250 bar core in the range for a high demand setup\u003c\/li\u003e\n\u003cli\u003eSwaps and one-off installs where the fuel feed is being fabricated rather than reused\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eThe AN06 Inlet Changes Your Plumbing\u003c\/h2\u003e\u003cp\u003eOn 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.\u003c\/p\u003e\u003ch2\u003eWhere The Extra Piston Diameter Goes\u003c\/h2\u003e\u003cp\u003eGoing 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 \u003ca href=\"\/products\/nostrum-nostrum-universal-low-side-pressure-pulsation-damper-an06-an06-ss-l061-1551\"\u003eAN06 pulsation damper\u003c\/a\u003e earns its place on an AN-plumbed system.\u003c\/p\u003e\u003ch2\u003eKey Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: Stanadyne Inc, supplied by Nostrum High Performance\u003c\/li\u003e\n\u003cli\u003eProduct Type: bare high pressure fuel pump core\u003c\/li\u003e\n\u003cli\u003eSKU: H116-1608\u003c\/li\u003e\n\u003cli\u003ePiston diameter: 11.49 mm\u003c\/li\u003e\n\u003cli\u003eMax operating pressure: 250 bar (25 MPa \/ 3636 psi)\u003c\/li\u003e\n\u003cli\u003eFittings: M14x1 high pressure, AN06 male low pressure\u003c\/li\u003e\n\u003cli\u003eIncluded: pump core only - no engine installation accessories or hardware\u003c\/li\u003e\n\u003cli\u003eSupply: shop and installer line, minimum order quantity of six pumps\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePlan the AN06 feed line, adapters and seals before ordering; adapting from a quick connect line means industry-standard AN hardware.\u003c\/li\u003e\n\u003cli\u003eDimensions are similar to the stock GM LT4 pump, which Nostrum identifies as 12711668 and 12694529 - check your mounting and drive arrangement against it.\u003c\/li\u003e\n\u003cli\u003eConfirm cam stroke and lobe count against the displacement figure. Nostrum quotes it at 6 mm stroke and our own catalogue record carries a differing stroke note, so ask Hoonies first.\u003c\/li\u003e\n\u003cli\u003eA pump holding this pressure needs a calibration written around it and a low pressure supply that keeps the inlet fed.\u003c\/li\u003e\n\u003cli\u003eMinimum order quantity is six, so this suits trade and build orders.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eStanadyne Inc (supplied by Nostrum High Performance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eBare high pressure fuel pump core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eH116-1608\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePiston Diameter\u003c\/th\u003e\n\u003ctd\u003e11.49 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Piston Travel\u003c\/th\u003e\n\u003ctd\u003e10 mm (TDC-BDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Operating Pressure\u003c\/th\u003e\n\u003ctd\u003e250 bar (25 MPa \/ 3636 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplaced Flow Per Cam Revolution\u003c\/th\u003e\n\u003ctd\u003e1865.44 mm³ (6 mm stroke)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHigh Pressure Fitting\u003c\/th\u003e\n\u003ctd\u003eM14x1 male thread with inner female cone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLow Pressure Fitting\u003c\/th\u003e\n\u003ctd\u003eAN06 male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComparable Dimensions\u003c\/th\u003e\n\u003ctd\u003eGM LT4 HPFP (12711668, 12694529)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded Items\u003c\/th\u003e\n\u003ctd\u003ePump core only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum Order Quantity\u003c\/th\u003e\n\u003ctd\u003e6 pumps (shop and installer supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWill it go straight onto an LT4 in place of the standard pump?\u003c\/h3\u003e\u003cp\u003eDimensions 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.\u003c\/p\u003e\u003ch3\u003eWhy choose this over the 1050-250?\u003c\/h3\u003e\u003cp\u003eMore displaced flow per cam revolution at the same 250 bar rating, and an AN feed instead of a quick connect. The \u003ca href=\"\/products\/nostrum-nostrum-stanadyne-1050-250-high-pressure-fuel-pump-h116-1607\"\u003e1050-250 core\u003c\/a\u003e is the choice if your plumbing is already SAE quick connect and demand is lower.\u003c\/p\u003e","vendor":"Nostrum High Performance","product_type":"High Pressure Fuel Pumps","created_at":"2026-07-24T13:03:44+01:00","handle":"nostrum-nostrum-stanadyne-1150-250-high-pressure-fuel-pump-h116-1608","updated_at":"2026-09-08T16:04:48+01:00","published_at":"2026-07-24T17:58:13+01:00","template_suffix":null,"published_scope":"global","tags":"brand:nostrum-high-performance, cat:fuel, dept:performance-parts, type:high-pressure-fuel-pumps","variants":[{"id":54805990080854,"product_id":11142677528918,"title":"Default Title","price":"1419.55","sku":"H116-1608","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-24T13:03:44+01:00","updated_at":"2026-09-08T16:04:48+01:00","taxable":true,"barcode":null,"grams":0,"image_id":null,"weight":0.0,"weight_unit":"kg","requires_shipping":true,"quantity_rule":{"min":1,"max":null,"increment":1},"price_currency":"GBP","compare_at_price_currency":"","quantity_price_breaks":[]}],"options":[{"id":14231279698262,"product_id":11142677528918,"name":"Title","position":1,"values":["Default Title"]}],"images":[],"image":null}}