{"product":{"id":11142673039702,"title":"Nostrum BMW B58 Gen 1 Stage 2 High Flow DI Injectors","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eThe Nostrum BMW B58 Gen 1 Stage 2 High Flow DI Injectors are the larger of Nostrum's two Gen 1 B58 injector steps, built for cars that have already moved past a standard turbo or a mild ethanol blend. At 1434 cc\/min at 100 bar they deliver 66% more flow than the factory injector, which is the volume an upgraded turbo or a heavy E85 target actually asks for. The spray pattern stays OEM equivalent, so the engine still burns in a way your tuner recognises. They are ethanol compatible and arrive as a complete set with a comprehensive installation guide. This is the injector to buy when the fuel side has to stop being the part of the build you plan around.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eUpgraded-turbo B58 Gen 1 builds that have already used up a smaller injector\u003c\/li\u003e\n\u003cli\u003eFull E85 targets, where ethanol needs materially more volume than petrol\u003c\/li\u003e\n\u003cli\u003eFuel systems being specified once, properly, rather than stepped up twice\u003c\/li\u003e\n\u003cli\u003eBuilds getting a custom calibration from a competent tuner, with room left at high duty cycle\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Stage 2 Is Rated To 220 Bar, Not 240\u003c\/h2\u003e\u003cp\u003eThis is the one specification worth reading twice. The Stage 2 injector has a 220 bar maximum operating pressure, where the smaller \u003ca href=\"\/products\/nostrum-b58-gen-1-stage-1-injectors\"\u003eStage 1 set\u003c\/a\u003e holds 240 bar. A bigger nozzle moves more fuel per millisecond but tolerates slightly less rail pressure, so the extra capacity has to be used as volume rather than as pressure. Tell your calibrator the rating before the first map, and the pressure target gets set correctly from the start.\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 injection (DI) injector set\u003c\/li\u003e\n\u003cli\u003eSKU: H750-1720\u003c\/li\u003e\n\u003cli\u003eVehicle Application: BMW B58 Gen 1 engines\u003c\/li\u003e\n\u003cli\u003eFlow: 1434 cc\/min at 100 bar, 66% over stock\u003c\/li\u003e\n\u003cli\u003eMax Operating Pressure: 220 bar \/ 22 MPa \/ 3200 psi\u003c\/li\u003e\n\u003cli\u003eFuel Compatibility: ethanol compatible\u003c\/li\u003e\n\u003cli\u003eIncluded Items: injector set with comprehensive installation guide\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePlanning The Pump Around Stage 2\u003c\/h2\u003e\u003cp\u003eFitting 66% more injector to a factory high pressure pump moves the restriction rather than removing it, because the pump still has to keep the rail full at the flow the injectors are now asking for. If the plan is a serious ethanol map, the \u003ca href=\"\/products\/nostrum-nostrum-b58-gen-1-stage-2-gauntlet-bundle-h186-2116\"\u003eStage 2 Gauntlet bundle\u003c\/a\u003e matches this set to the Gauntlet pump kit so the two parts are sized to each other.\u003c\/p\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eGen 1 B58 engines only; the Gen 2 uses a 350 bar fuel system and a different injector. A tune is required before the car is driven. Check the model and year table below against your car, and if it is an import or already carries turbo, fuel or ECU changes, send Hoonies those details first so the right stage is ordered.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\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 DI injector set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH750-1720\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Application\u003c\/td\u003e\n\u003ctd\u003eBMW B58 Gen 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume flow rate (nHeptane)\u003c\/td\u003e\n\u003ctd\u003e1434 cc\/min at 100 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMass flow rate (Viscor 16A)\u003c\/td\u003e\n\u003ctd\u003e17.3 g\/s at 100 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow increase over stock\u003c\/td\u003e\n\u003ctd\u003e66%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax operating pressure\u003c\/td\u003e\n\u003ctd\u003e220 bar \/ 22 MPa \/ 3200 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpray pattern\u003c\/td\u003e\n\u003ctd\u003eOEM equivalent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel compatibility\u003c\/td\u003e\n\u003ctd\u003eEthanol compatible\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, manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBMW model\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eMarket\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2-Series 240i \/ 240xi\u003c\/td\u003e\n\u003ctd\u003e2015-2017\u003c\/td\u003e\n\u003ctd\u003eROW models - please call to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM240i\u003c\/td\u003e\n\u003ctd\u003e2017-2021\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3-Series 340i \/ 340xi\u003c\/td\u003e\n\u003ctd\u003e2016-2019\u003c\/td\u003e\n\u003ctd\u003eNorth America\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4-Series 440i \/ 440xi\u003c\/td\u003e\n\u003ctd\u003e2017-2020\u003c\/td\u003e\n\u003ctd\u003eNorth America\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5-Series 540i \/ 540xi\u003c\/td\u003e\n\u003ctd\u003e2017-2020\u003c\/td\u003e\n\u003ctd\u003eNorth America\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6-Series 640i\u003c\/td\u003e\n\u003ctd\u003e2018-2019\u003c\/td\u003e\n\u003ctd\u003eNorth America\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7-Series 740i\u003c\/td\u003e\n\u003ctd\u003e2016-2019\u003c\/td\u003e\n\u003ctd\u003eNorth America\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eX3\u003c\/td\u003e\n\u003ctd\u003e2018-2019\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eX4\u003c\/td\u003e\n\u003ctd\u003e2019\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs Stage 2 too much injector for a standard turbo?\u003c\/h3\u003e\u003cp\u003eIt is more injector than a standard-turbo petrol car needs. Stage 2 earns its place on upgraded turbos and heavy ethanol blends; below that, Stage 1 is easier to calibrate cleanly.\u003c\/p\u003e\u003ch3\u003eIs this a full six-cylinder set?\u003c\/h3\u003e\u003cp\u003eYes. The B58 is a straight-six with one direct injector per cylinder, and the set covers the engine, installation guide included.\u003c\/p\u003e\u003ch3\u003eCan I run these on a Gen 2 B58 or an S58?\u003c\/h3\u003e\u003cp\u003eNo. Those engines run a 350 bar fuel system and a different injector. Nostrum builds a separate set for the S58 and B58 Gen 2, including the Toyota GR Supra A90.\u003c\/p\u003e","vendor":"Nostrum High Performance","product_type":"High Flow Direct Injectors","created_at":"2026-07-24T13:02:29+01:00","handle":"nostrum-b58-gen-1-stage-2-injectors","updated_at":"2026-09-08T16:24:32+01:00","published_at":"2026-07-24T17:57:34+01:00","template_suffix":null,"published_scope":"global","tags":"BMW, brand:nostrum-high-performance, cat:fuel, dept:performance-parts, make:bmw, type:high-flow-direct-injectors","variants":[{"id":54805979005270,"product_id":11142673039702,"title":"Default Title","price":"1853.30","sku":"H750-1720","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-24T13:02:29+01:00","updated_at":"2026-09-08T16:24:32+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":14231272259926,"product_id":11142673039702,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":83087868723542,"product_id":11142673039702,"position":1,"created_at":"2026-07-24T16:01:38+01:00","updated_at":"2026-07-24T16:01:41+01:00","alt":"Nostrum B58 Gen 1 Stage 2 Injectors","width":500,"height":332,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/B58_Gen_1_Stage_1_-_H620-1718-A_3_1__05450.1698693746.jpg?v=1784905301","variant_ids":[]}],"image":{"id":83087868723542,"product_id":11142673039702,"position":1,"created_at":"2026-07-24T16:01:38+01:00","updated_at":"2026-07-24T16:01:41+01:00","alt":"Nostrum B58 Gen 1 Stage 2 Injectors","width":500,"height":332,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/B58_Gen_1_Stage_1_-_H620-1718-A_3_1__05450.1698693746.jpg?v=1784905301","variant_ids":[]}}}