{"product":{"id":11142674088278,"title":"Nostrum Ford Focus RS 2.3 EcoBoost Big Bore High Pressure Fuel Pump Kit","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eThe Focus RS responds well to modification right up to the point where the standard fuel system says no, and on a 2.3 EcoBoost that arrives sooner than most owners expect. This is Nostrum's Big Bore high pressure fuel pump kit for the RS, the larger of its two RS pumps and the one with the full specification published: 1.83 cc\/rev, 63 percent more flow than the factory pump, and 240 bar working pressure. It is a laser-welded stainless assembly, production tested, and it ships with the custom high pressure tube and mounting flange rather than leaving you to source them. That buys boost brought in earlier and held, ethanol capability, and enough headroom that the pump stops being the thing a tuner works around.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRS logs showing rail pressure drop before the turbo has run out.\u003c\/li\u003e\n\u003cli\u003eBuilt engines and larger turbos sized for the end goal.\u003c\/li\u003e\n\u003cli\u003eCars committing to ethanol rather than dabbling with a blend.\u003c\/li\u003e\n\u003cli\u003eRS builds that will later take upgraded or Race direct injectors.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhen The RS Needs The Big Bore\u003c\/h2\u003e\u003cp\u003eNostrum sells two pump sizes for this car. The \u003ca href=\"\/products\/nostrum-nostrum-2-3l-ecoboost-ford-focus-rs-1050-250-hpfp-kit-h086-2133\"\u003e1050-250 Standard Bore Plus kit\u003c\/a\u003e is the smaller body for a stock-turbo car. This Big Bore is the one for a build going somewhere: more displacement per revolution means more fuel low and mid-range, where the pump turns slowly and struggles most to keep up. It is also the pump Nostrum pairs with its Race injectors, so it keeps the door open later.\u003c\/p\u003e\u003ch2\u003eWhat Comes With The Pump\u003c\/h2\u003e\u003cp\u003eThis is not a bare pump. Alongside the welded stainless assembly you get the accessories the job needs, including the high pressure tube and mounting flange, plus a printed install guide, with a tuning guide available through dealers. The standard low-pressure feed line is retained, keeping the install at the top of the engine.\u003c\/p\u003e\u003ch2\u003eKey Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: Nostrum High Performance\u003c\/li\u003e\n\u003cli\u003eProduct Type: Big Bore direct-injection high pressure fuel pump kit\u003c\/li\u003e\n\u003cli\u003eSKU: H086-1116\u003c\/li\u003e\n\u003cli\u003eVehicle Application: Ford Focus RS 2.3 EcoBoost, 2016 onwards\u003c\/li\u003e\n\u003cli\u003eFlow: 1.83 cc\/rev, 63 percent more than the factory pump, 240 bar maximum\u003c\/li\u003e\n\u003cli\u003eIncluded Items: Big Bore high pressure fuel pump, high pressure tube, mounting flange, install guide\u003c\/li\u003e\n\u003cli\u003eRequired separately: supporting calibration\u003c\/li\u003e\n\u003cli\u003eFitment type: vehicle-specific; the RS flange does not suit the 2.3 Mustang or Ranger pump\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eNostrum covers the 2016 onwards Ford Focus RS. A tune is required; Nostrum lists COBB, HP Tuners and SCT, and names ECUTek in its description too, so confirm the platform with your tuner before booking the car in. The RS pump uses its own mounting flange, which will not interchange with the 2.3 Mustang or Ranger pumps, so order RS-specific service parts if you need them. If you are unsure, use a professional fitter.\u003c\/p\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH086-1116\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump class\u003c\/td\u003e\n\u003ctd\u003eBig Bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeometric displacement\u003c\/td\u003e\n\u003ctd\u003e1.83 cc\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow increase over stock\u003c\/td\u003e\n\u003ctd\u003e63 percent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum pressure\u003c\/td\u003e\n\u003ctd\u003e240 bar \/ 24 MPa \/ 3500 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eFully laser-welded stainless steel, 100 percent production tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel\u003c\/td\u003e\n\u003ctd\u003ePetrol, E85 and blended ethanol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel system capacity\u003c\/td\u003e\n\u003ctd\u003e770 whp petrol, 570 whp E85, with a supporting build and tune\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning suites\u003c\/td\u003e\n\u003ctd\u003eCOBB, HP Tuners, SCT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eNostrum limited lifetime\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eYears\u003c\/td\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eEngine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016+\u003c\/td\u003e\n\u003ctd\u003eFord Focus RS\u003c\/td\u003e\n\u003ctd\u003e2.3L EcoBoost\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhy does a pump alone not show a big peak gain?\u003c\/h3\u003e\u003cp\u003eA direct injection system is usually pump-limited in the midrange and injector-limited at high rpm. The pump fixes the first, felt as torque and boost response rather than a new peak figure.\u003c\/p\u003e\u003ch3\u003eThis or the Stage 2 bundle?\u003c\/h3\u003e\u003cp\u003eIf your injectors are still standard and you know they are next, the \u003ca href=\"\/products\/nostrum-ford-focus-rs-stage-2-high-flow-pump-and-injector-bundle\"\u003eStage 2 bundle\u003c\/a\u003e holds this same Big Bore pump with a matched injector set and saves a second job.\u003c\/p\u003e\u003ch3\u003eIs a rail sensor upgrade needed?\u003c\/h3\u003e\u003cp\u003eNostrum quotes 240 bar for this kit without making a sensor upgrade a condition on the RS, unlike the smaller Ford applications. Your tuner will confirm what the car can command on the ramp.\u003c\/p\u003e","vendor":"Nostrum High Performance","product_type":"High Pressure Fuel Pumps","created_at":"2026-07-24T13:02:39+01:00","handle":"nostrum-2-3l-ecoboost-ford-focus-rs-high-pressure-fuel-pump-kit","updated_at":"2026-09-08T19:12:38+01:00","published_at":"2026-07-24T17:57:40+01:00","template_suffix":null,"published_scope":"global","tags":"brand:nostrum-high-performance, cat:fuel, dept:performance-parts, fits:ford-focus, Ford, Ford Focus, Ford Focus RS, make:ford, type:high-pressure-fuel-pumps","variants":[{"id":54805980086614,"product_id":11142674088278,"title":"Default Title","price":"2480.74","sku":"H086-1116","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-24T13:02:39+01:00","updated_at":"2026-09-08T19:12:38+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":14231273603414,"product_id":11142674088278,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":83087869116758,"product_id":11142674088278,"position":1,"created_at":"2026-07-24T16:01:41+01:00","updated_at":"2026-07-24T16:01:43+01:00","alt":"Nostrum 2.3L EcoBoost Ford Focus RS High Pressure Fuel Pump Kit","width":386,"height":386,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/H086-1116-2.3L_Ecoboost_Focus_RS_High_Pressure_Fuel_Pump_Kits__38202.1697736754.386.513_4a8bc1f1-274c-46b7-acca-a1d520a84e5d.jpg?v=1784905303","variant_ids":[]}],"image":{"id":83087869116758,"product_id":11142674088278,"position":1,"created_at":"2026-07-24T16:01:41+01:00","updated_at":"2026-07-24T16:01:43+01:00","alt":"Nostrum 2.3L EcoBoost Ford Focus RS High Pressure Fuel Pump Kit","width":386,"height":386,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/H086-1116-2.3L_Ecoboost_Focus_RS_High_Pressure_Fuel_Pump_Kits__38202.1697736754.386.513_4a8bc1f1-274c-46b7-acca-a1d520a84e5d.jpg?v=1784905303","variant_ids":[]}}}