{"product":{"id":11142675628374,"title":"Nostrum Subaru 2.0 FA20DIT High Pressure Fuel Pump","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eThe cam-driven high pressure pump fills the direct injection rail on an FA20DIT, and on a WRX or Forester XT that has picked up an intake, intercooler and a bit more boost it is usually the first thing to run out. Nostrum's replacement flows 37% more than the factory pump at up to 150 bar, arrives fully assembled and is flow tested before sale. The result is boost dialled in earlier without rail pressure collapsing, felt as low-end torque rather than a peak number. It is ethanol compatible, so E85 becomes a realistic fuel choice.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eA bolt-on VA WRX where the tuner is already trimming boost in the mid range to protect rail pressure.\u003c\/li\u003e\n\u003cli\u003eForester XT owners who want the same fuelling headroom on a car that rarely gets platform-specific parts.\u003c\/li\u003e\n\u003cli\u003eAnyone planning a move to pump E85 and needing the delivery side of the fuel system to support it.\u003c\/li\u003e\n\u003cli\u003eBuilds where injectors follow later - the pump can be fitted first and driven on.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere The Factory FA20DIT Pump Gives Up\u003c\/h2\u003e\u003cp\u003eBeing camshaft driven, this pump turns at half crank speed, so output is tied to engine speed. Around peak torque there is plenty of time per injection event but not enough volume behind it, and that is where the standard unit runs short once boost goes up. A 37% larger flow capacity gives the calibration room to bring boost in earlier and hold the fuel target while it does - a very different feeling on the road from a peak-power-only change.\u003c\/p\u003e\u003ch2\u003eRunning E85 In A WRX Or Forester XT\u003c\/h2\u003e\u003cp\u003eEthanol carries a higher effective octane and is less knock prone than 95 or 99 pump petrol, but needs materially more volume for the same air. Nostrum recommends full pump E85 over intermediate blends, because blends around E30 to E50 can drop gasoline additives out of solution and gum up any fuel system. If you do blend, occasional tanks of straight petrol are worth treating as maintenance.\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 pressure fuel pump (HPFP), fully assembled\u003c\/li\u003e\n\u003cli\u003eSKU: H136-0571\u003c\/li\u003e\n\u003cli\u003eFlow: 37% more than the factory pump\u003c\/li\u003e\n\u003cli\u003eGeometric displacement: 1.57 cc\/rev\u003c\/li\u003e\n\u003cli\u003eMax operating pressure: 150 bar \/ 15 MPa \/ 2200 psi\u003c\/li\u003e\n\u003cli\u003eFuel: ethanol compatible, E85 or blends\u003c\/li\u003e\n\u003cli\u003eIncluded: direct fit pump and installation instructions; COBB and EcuTek supported\u003c\/li\u003e\n\u003cli\u003eWarranty: Nostrum limited lifetime\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eCovers the 2015-2021 Subaru WRX and 2014-2018 Forester XT. Nostrum states the pump can be fitted and driven on without a tune, but recommends calibrating to use its full capacity, so plan the tuning as part of the job. The 725 whp gasoline and 550 whp E85 figures are fuel-system capacity for a fully supported build. For the top end as well as the mid range, add the \u003ca href=\"\/products\/nostrum-2-0l-subaru-upgraded-direct-injectors\"\u003ematching upgraded direct injectors\u003c\/a\u003e, or buy the two together as the \u003ca href=\"\/products\/nostrum-2-0l-subaru-fa20dit-stage-1-bundle\"\u003eFA20DIT Stage 1 bundle\u003c\/a\u003e.\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014-2018\u003c\/td\u003e\n\u003ctd\u003eSubaru Forester XT\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 pressure fuel pump (HPFP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH136-0571\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\u003e37% over the factory pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeometric Displacement\u003c\/td\u003e\n\u003ctd\u003e1.57 cc\/rev\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\u003eFuel Compatibility\u003c\/td\u003e\n\u003ctd\u003eEthanol compatible, E85 or blends\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Items\u003c\/td\u003e\n\u003ctd\u003eFully assembled pump, installation instructions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTune Requirement\u003c\/td\u003e\n\u003ctd\u003eDriveable untuned; calibration recommended (COBB, EcuTek)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel System Capacity\u003c\/td\u003e\n\u003ctd\u003e725 whp gasoline \/ 550 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhy do I not see a big peak power change from the pump alone?\u003c\/h3\u003e\u003cp\u003eThe pump addresses the mid range, where the limit is volume rather than time. Peak power is usually injector limited at high rpm, which is why the two are often bought together.\u003c\/p\u003e\u003ch3\u003eCan I run E30 or E50 blends?\u003c\/h3\u003e\u003cp\u003eNostrum recommends full pump E85 over intermediate blends. Around E30 to E50, additives can come out of solution and leave a residue in the fuel system. If you do blend, run straight petrol occasionally as maintenance.\u003c\/p\u003e\u003ch3\u003eDoes the pump come ready to fit?\u003c\/h3\u003e\u003cp\u003eYes - fully assembled and flow tested, with installation instructions in the box. No separate flange or tube assembly is needed here.\u003c\/p\u003e","vendor":"Nostrum High Performance","product_type":"High Pressure Fuel Pumps","created_at":"2026-07-24T13:03:17+01:00","handle":"nostrum-2-0l-subaru-fa20dit-high-pressure-fuel-pump","updated_at":"2026-09-08T20:30:53+01:00","published_at":"2026-07-24T17:57:58+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-pressure-fuel-pumps","variants":[{"id":54805988180310,"product_id":11142675628374,"title":"Default Title","price":"1029.78","sku":"H136-0571","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-24T13:03:17+01:00","updated_at":"2026-09-08T20:30:53+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":14231277404502,"product_id":11142675628374,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":83087873179990,"product_id":11142675628374,"position":1,"created_at":"2026-07-24T16:01:55+01:00","updated_at":"2026-07-24T16:01:57+01:00","alt":"Nostrum 2.0L Subaru FA20DIT High Pressure Fuel Pump","width":386,"height":386,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/subaru_pump_02__09470.1693944525.386.513_a477b0a9-f3d8-4df8-9e46-0868ff0507dd.jpg?v=1784905317","variant_ids":[]}],"image":{"id":83087873179990,"product_id":11142675628374,"position":1,"created_at":"2026-07-24T16:01:55+01:00","updated_at":"2026-07-24T16:01:57+01:00","alt":"Nostrum 2.0L Subaru FA20DIT High Pressure Fuel Pump","width":386,"height":386,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/subaru_pump_02__09470.1693944525.386.513_a477b0a9-f3d8-4df8-9e46-0868ff0507dd.jpg?v=1784905317","variant_ids":[]}}}