{"product":{"id":11142674219350,"title":"Nostrum Ford Mustang 2.3 EcoBoost Big Bore HPFP Kit","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eBig Bore is the largest high pressure fuel pump Nostrum builds for the 2.3 EcoBoost Mustang, and it is the pump you fit when the fuel system has to keep up with a bigger turbo, a built engine or a serious ethanol tune. It flows 63% more fuel than the factory pump from 1.825 cc\/rev of displacement, holds 240 bar of rail pressure, and comes as a fully laser-welded stainless assembly with its own custom high pressure fuel line, mounting flange and installation guide. The factory low-pressure feed line stays in place, so the install is contained to the pump end of the system. For a 2015-2023 EcoBoost Mustang that has already outgrown the stock turbo, this is the version that stops fuel being the thing holding the calibration back.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBig-turbo and hybrid-turbo 2.3 EcoBoost Mustang builds where the stock pump gave up long ago\u003c\/li\u003e\n\u003cli\u003eBuilt engines and track cars chasing consistent fuelling at sustained high load\u003c\/li\u003e\n\u003cli\u003eEthanol and E85 tunes, which ask for considerably more volume than petrol for the same air\u003c\/li\u003e\n\u003cli\u003eBuilds planning a full fuel system in one step rather than upgrading twice\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow Much Pump Does The Build Actually Need\u003c\/h2\u003e\u003cp\u003eThe honest answer depends on the turbo. A stock-turbo car chasing pump E85 is well served by the \u003ca href=\"\/products\/nostrum-2-3l-ecoboost-mustang-standard-bore-plus-high-pressure-fuel-pump-kit\"\u003eStandard Bore Plus kit\u003c\/a\u003e at 37% extra flow and the same 240 bar ceiling. Once a larger compressor is bolted on, mid-range fuel demand climbs faster than the smaller pump can follow, and Big Bore's extra displacement is what lets a tuner bring boost in early and keep the rail pressure target where they want it. The parts are not interchangeable in the box either: Big Bore ships with its own high pressure line, so plan the choice once.\u003c\/p\u003e\u003ch2\u003eKey Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: Nostrum High Performance\u003c\/li\u003e\n\u003cli\u003eProduct Type: direct injection high pressure fuel pump kit\u003c\/li\u003e\n\u003cli\u003eSKU: H086-0742\u003c\/li\u003e\n\u003cli\u003eVehicle Application: 2015-2023 Ford Mustang 2.3 EcoBoost\u003c\/li\u003e\n\u003cli\u003eFlow: 63% more than the factory pump\u003c\/li\u003e\n\u003cli\u003eGeometric displacement: 1.825 cc\/rev\u003c\/li\u003e\n\u003cli\u003eMax operating pressure: 240 bar\u003c\/li\u003e\n\u003cli\u003eFuel: E85 compatible\u003c\/li\u003e\n\u003cli\u003eIncluded Items: Big Bore HPFP, custom high pressure fuel tube, mounting flange, installation guide\u003c\/li\u003e\n\u003cli\u003eUses the factory low-pressure feed line\u003c\/li\u003e\n\u003cli\u003eRequired: a supporting calibration, which is not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits the 2015-2023 Ford Mustang 2.3 EcoBoost. Check the year and engine against your car, and talk to us first if it is an import or heavily modified.\u003c\/li\u003e\n\u003cli\u003eA tune is required. Nostrum states this pump is tunable on COBB and ECUTek software, and its spec table adds HP Tuners and SCT, so line the calibration up with your tuner before the pump goes on.\u003c\/li\u003e\n\u003cli\u003eNostrum builds it as a direct bolt-on kit that retains the stock low-pressure feed line, so no additional plumbing is needed on that side.\u003c\/li\u003e\n\u003cli\u003eInjectors are not included. Pairing the pump with high flow injectors is what removes the top-end limit as well as the mid-range one.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eNostrum High Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eHigh pressure fuel pump kit (direct injection)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH086-0742\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Application\u003c\/td\u003e\n\u003ctd\u003e2015-2023 Ford Mustang 2.3 EcoBoost\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow increase\u003c\/td\u003e\n\u003ctd\u003e63% over the factory pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeometric displacement\u003c\/td\u003e\n\u003ctd\u003e1.825 cc\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax operating pressure\u003c\/td\u003e\n\u003ctd\u003e240 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eFully laser-welded stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel compatibility\u003c\/td\u003e\n\u003ctd\u003eE85 compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning platforms\u003c\/td\u003e\n\u003ctd\u003eCOBB, ECUTek (spec table adds HP Tuners, SCT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded items\u003c\/td\u003e\n\u003ctd\u003eHPFP, custom high pressure fuel line, mounting flange, installation guide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eNostrum Limited Lifetime, manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs Big Bore overkill on a stock turbo?\u003c\/h3\u003e\u003cp\u003eIt is more pump than a stock-turbo car will use, and there is nothing harmful about that, but the smaller kit costs less and still covers pump E85 on the factory compressor. Choose Big Bore when the turbo change is already planned.\u003c\/p\u003e\u003ch3\u003eDoes the extra flow change fuel pressure control?\u003c\/h3\u003e\u003cp\u003eThe pump is still controlled by the ECU through the factory strategy; it simply has more displacement per revolution to work with. That is why the calibration has to be updated rather than left as it is.\u003c\/p\u003e\u003ch3\u003eShould I buy the pump and injectors together?\u003c\/h3\u003e\u003cp\u003eOften yes. The \u003ca href=\"\/products\/nostrum-2-3l-ecoboost-mustang-stage-2-bundle\"\u003eStage 2 bundle\u003c\/a\u003e pairs this Big Bore pump with four matched high flow direct injectors and the custom fuel line, which is the same hardware you would end up buying separately.\u003c\/p\u003e","vendor":"Nostrum High Performance","product_type":"High Pressure Fuel Pumps","created_at":"2026-07-24T13:02:42+01:00","handle":"nostrum-2-3l-ecoboost-mustang-big-bore-high-pressure-fuel-pump-kit","updated_at":"2026-09-08T21:27:39+01:00","published_at":"2026-07-24T17:57:41+01:00","template_suffix":null,"published_scope":"global","tags":"brand:nostrum-high-performance, cat:fuel, dept:performance-parts, fits:ford-mustang, fits:ford-mustang-ecoboost-2-3l, Ford, Ford Mustang, Ford Mustang EcoBoost, make:ford, type:high-pressure-fuel-pumps","variants":[{"id":54805980217686,"product_id":11142674219350,"title":"Default Title","price":"2480.74","sku":"H086-0742","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-24T13:02:42+01:00","updated_at":"2026-09-08T21:27:39+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":14231273963862,"product_id":11142674219350,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":83087869215062,"product_id":11142674219350,"position":1,"created_at":"2026-07-24T16:01:42+01:00","updated_at":"2026-07-24T16:01:44+01:00","alt":"Nostrum 2.3L Ecoboost Mustang Big Bore High Pressure Fuel Pump Kit","width":500,"height":500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/2.3L_Ecoboost_Mustang_High_Pressure_Fuel_Pump_Kits__31165.1695309834_f961df88-2265-4122-aeb6-ce6a0b889cea.jpg?v=1784905304","variant_ids":[]}],"image":{"id":83087869215062,"product_id":11142674219350,"position":1,"created_at":"2026-07-24T16:01:42+01:00","updated_at":"2026-07-24T16:01:44+01:00","alt":"Nostrum 2.3L Ecoboost Mustang Big Bore High Pressure Fuel Pump Kit","width":500,"height":500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/2.3L_Ecoboost_Mustang_High_Pressure_Fuel_Pump_Kits__31165.1695309834_f961df88-2265-4122-aeb6-ce6a0b889cea.jpg?v=1784905304","variant_ids":[]}}}