{"product":{"id":11142678151510,"title":"Nostrum Ford Focus RS 2.3 EcoBoost Stage 3 Race Injector and Big Bore Pump Bundle","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eStage 3 is the top of Nostrum's Focus RS fuel ladder and it is unapologetically for built cars. It pairs the Race direct injectors, 1950 cc\/min and 45 percent more than the standard 2.3 EcoBoost injector, with the Big Bore 1150-250 pump supplying 63 percent more than the factory unit. The reason to come here rather than Stage 2 is simple: on a built engine with a large turbo the injector runs out of time at high rpm, and the Race set is the only one in the range with enough flow to stay ahead of it. It all still runs through the factory direct injection system under the standard ECU.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBuilt RS engines on a large turbo where Stage 2 injectors are the ceiling.\u003c\/li\u003e\n\u003cli\u003eDrag, time attack and dyno cars where high-rpm fuelling decides the run.\u003c\/li\u003e\n\u003cli\u003eOwners buying the fuel system once for a car they will keep developing.\u003c\/li\u003e\n\u003cli\u003eHigh ethanol builds needing much more mass flow per cycle.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eStage 2 Or Stage 3 For An RS\u003c\/h2\u003e\u003cp\u003eThe honest answer is that most road RS builds want \u003ca href=\"\/products\/nostrum-ford-focus-rs-stage-2-high-flow-pump-and-injector-bundle\"\u003eStage 2\u003c\/a\u003e. Its injectors are smaller but carry a 240 bar working pressure, which keeps drivability easy and gives the tuner more pressure to play with. Stage 3 goes the other way: far more flow, but the Race injector's pressure ceiling is 200 bar, so the extra fuel comes from nozzle size rather than pressure. On a standard-turbo car that trade makes no sense. On a built engine that has already outgrown Stage 2, it is the only sensible move.\u003c\/p\u003e\u003ch2\u003eWhy The Race Injector Caps At 200 Bar\u003c\/h2\u003e\u003cp\u003eA bigger nozzle with a lower pressure ceiling is a deliberate choice, not a shortcut. Nostrum develops the Race injector's plume for atomisation quality at that flow, because a large injector spraying badly brings soot, knock, bore wash and oil dilution with it. Pairing it with the Big Bore pump matters for the same reason: the rail has to stay fed at the volume these injectors pull.\u003c\/p\u003e\u003ch2\u003eKey Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: Nostrum High Performance\u003c\/li\u003e\n\u003cli\u003eProduct Type: Race injector and Big Bore pump package\u003c\/li\u003e\n\u003cli\u003eSKU: H186-2095\u003c\/li\u003e\n\u003cli\u003eVehicle Application: Ford Focus RS 2.3 EcoBoost, 2016 onwards\u003c\/li\u003e\n\u003cli\u003eInjectors: Race set, 1950 cc\/min, 45 percent over the standard 2.3 injector\u003c\/li\u003e\n\u003cli\u003ePump: Big Bore 1150-250, 63 percent more flow than stock\u003c\/li\u003e\n\u003cli\u003eIncluded Items: Race EcoBoost injectors, Big Bore high pressure fuel pump, fitting hardware, installation instructions\u003c\/li\u003e\n\u003cli\u003eRequired separately: supporting calibration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eNostrum covers the 2016 onwards Ford Focus RS 2.3 EcoBoost here, naming Tunewerks, JEM Sport and PD Tuning as tuners. A tune is required and matters more here than lower down the range, because an injector this large needs the calibration built around it to idle and drive properly. Big Bore kits are made to order, so talk to us before booking the car in. 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\u003eFuel system bundle, Race injectors and pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH186-2095\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInjector volume flow\u003c\/td\u003e\n\u003ctd\u003e1950 cc\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInjector flow increase over stock\u003c\/td\u003e\n\u003ctd\u003e45 percent over the standard 2.3 EcoBoost injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInjector maximum pressure\u003c\/td\u003e\n\u003ctd\u003e200 bar \/ 20 MPa \/ 2900 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump class\u003c\/td\u003e\n\u003ctd\u003eBig Bore 1150-250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump flow increase over stock\u003c\/td\u003e\n\u003ctd\u003e63 percent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSealing\u003c\/td\u003e\n\u003ctd\u003eDouble Teflon combustion seals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel\u003c\/td\u003e\n\u003ctd\u003e93 octane petrol, E60 and E85\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTune required\u003c\/td\u003e\n\u003ctd\u003eYes\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\u003eIs Stage 3 too much for a road-driven RS?\u003c\/h3\u003e\u003cp\u003eIt can be. The Race injector is sized for built engines and big turbos, and on a standard-turbo car you would be giving up pressure headroom for flow you cannot use. Stage 2 is the better road setup.\u003c\/p\u003e\u003ch3\u003eCan I buy the Race injectors on their own?\u003c\/h3\u003e\u003cp\u003eYes, the \u003ca href=\"\/products\/nostrum-ford-ecoboost-2-0-and-2-3-race-direct-injectors\"\u003eRace direct injectors\u003c\/a\u003e are sold separately if your RS already runs a Big Bore pump.\u003c\/p\u003e\u003ch3\u003eDoes anything else in the fuel system need upgrading?\u003c\/h3\u003e\u003cp\u003eThe package covers the direct injection side. Low pressure supply, in-tank hardware and the calibration are separate, so plan those with your tuner before the car goes on the ramp.\u003c\/p\u003e","vendor":"Nostrum High Performance","product_type":"Fuel Systems","created_at":"2026-07-24T13:03:59+01:00","handle":"nostrum-ford-focus-rs-stage-3-race-bundle","updated_at":"2026-09-08T16:24:30+01:00","published_at":"2026-07-24T17:58:21+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:fuel-systems","variants":[{"id":54805995749718,"product_id":11142678151510,"title":"Default Title","price":"3773.94","sku":"H186-2095","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-24T13:03:59+01:00","updated_at":"2026-09-08T16:24:30+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":14231280484694,"product_id":11142678151510,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":83087875080534,"product_id":11142678151510,"position":1,"created_at":"2026-07-24T16:02:07+01:00","updated_at":"2026-07-24T16:02:09+01:00","alt":"Nostrum Ford Focus RS Stage 3 Race Bundle","width":386,"height":386,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/2.3_race__64115__10918.1762532293_98233cd8-36f3-4dae-b7bb-c414e3d52098.png?v=1784905329","variant_ids":[]}],"image":{"id":83087875080534,"product_id":11142678151510,"position":1,"created_at":"2026-07-24T16:02:07+01:00","updated_at":"2026-07-24T16:02:09+01:00","alt":"Nostrum Ford Focus RS Stage 3 Race Bundle","width":386,"height":386,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/2.3_race__64115__10918.1762532293_98233cd8-36f3-4dae-b7bb-c414e3d52098.png?v=1784905329","variant_ids":[]}}}