{"product":{"id":11142675562838,"title":"Nostrum Subaru FA20DIT 2.0 Upgraded DI Injectors, Set of 4","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eNostrum's upgraded direct injectors for the FA20DIT, the 2.0 turbo in the 2015-2021 WRX and 2014-2018 Forester XT. They flow 10% more than the factory injector at up to 150 bar and come as a set of four, flow tested and serialised with their tuning data. What matters on this platform is that they stay under stock ECU control, so a WRX chasing more from an intake, intercooler and low pressure pump gets the extra top-end fuel without a secondary injection controller or a methanol tank. The revised part also closes faster than the injector it replaced.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eA tuned VA-chassis WRX out of injector at the top of the rev range and unable to hold its fuel target.\u003c\/li\u003e\n\u003cli\u003eMoving to pump E85, where volume demand jumps beyond what the standard injector was sized for.\u003c\/li\u003e\n\u003cli\u003eKeeping COBB or EcuTek on the factory ECU rather than adopting auxiliary fuel control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eKeeping The Stock ECU On A Tuned FA20DIT\u003c\/h2\u003e\u003cp\u003eMost routes to more fuel on a direct injected Subaru mean adding a system: port injection with its own controller, or methanol with a tank to fill and nozzles to keep clear. Nostrum's claim is that none of that is needed, because this is the only DI injector upgrade for the FA20F that works with the standard ECU. The outline matches the OE injector and the spray pattern is OEM equivalent, so idle, cold start and drivability behave as the calibration expects.\u003c\/p\u003e\u003ch2\u003ePairing The Injectors With The FA20 Pump\u003c\/h2\u003e\u003cp\u003eA direct injection engine is usually pump limited in the mid range and injector limited up top. Nostrum recommends running these alongside the \u003ca href=\"\/products\/nostrum-2-0l-subaru-fa20dit-high-pressure-fuel-pump\"\u003eFA20DIT high pressure fuel pump\u003c\/a\u003e, which flows 37% more than the factory unit, so the boost dialled in early is still supported as the revs climb. Buying both? The \u003ca href=\"\/products\/nostrum-2-0l-subaru-fa20dit-stage-1-bundle\"\u003eStage 1 bundle\u003c\/a\u003e is the pre-matched route.\u003c\/p\u003e\u003ch2\u003eKey Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: Nostrum High Performance\u003c\/li\u003e\n\u003cli\u003eProduct type: high flow direct injectors (DI), set of 4\u003c\/li\u003e\n\u003cli\u003eSKU: H720-1813\u003c\/li\u003e\n\u003cli\u003eFlow: 10% more than stock, 1302 cc\/min at 100 bar\u003c\/li\u003e\n\u003cli\u003eMax operating pressure: 150 bar \/ 15 MPa \/ 2200 psi\u003c\/li\u003e\n\u003cli\u003eControl: OEM ECU controlled, tunable on COBB or EcuTek; ethanol compatible\u003c\/li\u003e\n\u003cli\u003eIncluded: four serialised injectors, installation instructions, tuning guide for certified tuners\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eNostrum lists the 2015-2021 WRX (FA20F, VA chassis) and 2014-2018 Forester XT (FA20E), and states this is not a direct fit for the 2022 WRX, which moved to the FA24F. A tune is not needed to start the car, but Nostrum recommends calibrating after install to keep drivability right. One note when booking that: the current tuning guide matches this part number, and injectors bought before March 2024 under the older number use different data, so check your tuner has the right file. The 620 whp gasoline and 460 whp E85 figures are fuel-system capacity on a fully supported build.\u003c\/p\u003e\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015-2021\u003c\/td\u003e\n\u003ctd\u003eSubaru WRX - FA20F, VA chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014-2018\u003c\/td\u003e\n\u003ctd\u003eSubaru Forester XT - FA20E, 2.0 turbo FA20 engine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2022+ WRX\u003c\/td\u003e\n\u003ctd\u003eNot a direct fit (FA24F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\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 flow direct injectors (DI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH720-1813\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSet Size\u003c\/td\u003e\n\u003ctd\u003e4, serialised batch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Application\u003c\/td\u003e\n\u003ctd\u003eSubaru FA20DIT 2.0 turbo (direct injection)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow Increase\u003c\/td\u003e\n\u003ctd\u003e10% over stock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow Rate\u003c\/td\u003e\n\u003ctd\u003e15.7 g\/s (Viscor 16A) \/ 1302 cc\/min (nHeptane) at 100 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Operating Pressure\u003c\/td\u003e\n\u003ctd\u003e150 bar \/ 15 MPa \/ 2200 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Management\u003c\/td\u003e\n\u003ctd\u003eFactory ECU; COBB or EcuTek\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Compatibility\u003c\/td\u003e\n\u003ctd\u003eEthanol compatible, E85 and gasoline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel System Capacity\u003c\/td\u003e\n\u003ctd\u003e620 whp gasoline \/ 460 whp E85 with full supporting build\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLimited lifetime (manufacturing defects)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eCan I drive the car straight after fitting them?\u003c\/h3\u003e\u003cp\u003eNostrum says a tune is not required to start the car, but recommends calibrating after install to maintain drivability. Book the tuning before you fit them.\u003c\/p\u003e\u003ch3\u003eWill they fit my BRZ?\u003c\/h3\u003e\u003cp\u003eNo. The FA20 in the BRZ uses a completely different style of direct injector.\u003c\/p\u003e\u003ch3\u003eTen percent does not sound like much - is it worth it?\u003c\/h3\u003e\u003cp\u003eOn a direct injection engine the injector limit bites at high rpm, where crank angle per injection event runs short. Ten percent there lets the calibrator hold the fuel target at peak power instead of pulling boost.\u003c\/p\u003e","vendor":"Nostrum High Performance","product_type":"High Flow Direct Injectors","created_at":"2026-07-24T13:03:16+01:00","handle":"nostrum-2-0l-subaru-upgraded-direct-injectors","updated_at":"2026-09-08T18:06:12+01:00","published_at":"2026-07-24T17:57:57+01:00","template_suffix":null,"published_scope":"global","tags":"brand:nostrum-high-performance, cat:fuel, dept:performance-parts, fits:subaru-forester, fits:subaru-wrx, make:subaru, Subaru, Subaru Forester, Subaru Forester XT, Subaru WRX, type:high-flow-direct-injectors","variants":[{"id":54805988082006,"product_id":11142675562838,"title":"Default Title","price":"1001.89","sku":"H720-1813","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-24T13:03:16+01:00","updated_at":"2026-09-08T18:06:12+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":14231277338966,"product_id":11142675562838,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":83087872950614,"product_id":11142675562838,"position":1,"created_at":"2026-07-24T16:01:54+01:00","updated_at":"2026-07-24T16:01:56+01:00","alt":"Nostrum 2.0L Subaru Upgraded Direct Injectors","width":500,"height":500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/MicrosoftTeams-image_55__48928.1694016830_b854a67f-41d8-4988-9ac5-313a61876d61.jpg?v=1784905316","variant_ids":[]}],"image":{"id":83087872950614,"product_id":11142675562838,"position":1,"created_at":"2026-07-24T16:01:54+01:00","updated_at":"2026-07-24T16:01:56+01:00","alt":"Nostrum 2.0L Subaru Upgraded Direct Injectors","width":500,"height":500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/MicrosoftTeams-image_55__48928.1694016830_b854a67f-41d8-4988-9ac5-313a61876d61.jpg?v=1784905316","variant_ids":[]}}}