{"product":{"id":11142673334614,"title":"Nostrum BMW S58 \u0026 B58 Gen 2 \/ Toyota GR Supra A90 High Flow DI Injectors","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eOne injector set covers two of the most tuned straight-sixes on the road: BMW's S58 in the G80 M3, G82 M4 and X3 M, the Gen 2 B58 in the G-series 40i cars, and the Toyota GR Supra A90 and A91, which shares the same BMW-built engine. Rated at 1144 cc\/min at 100 bar and capable of a 350 bar rail, these Nostrum injectors deliver 60% more flow than a stock Gen 2 B58 injector and 26% more than a stock S58 injector. The 8-hole spray geometry stays OEM equivalent, so a tuner is refining known behaviour rather than starting again. They are ethanol compatible, which is where the extra volume earns its keep, and each set ships with a full installation guide plus a tuning guide carrying data for the popular suites.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGR Supra A90 and A91 owners chasing an ethanol map on the standard or an upgraded turbo\u003c\/li\u003e\n\u003cli\u003eG80 M3, G82 M4 and X3 M builds where the twin-turbo S58 has used up factory injector headroom\u003c\/li\u003e\n\u003cli\u003eGen 2 B58 cars where 60% more injector flow is the single biggest fuel-side step available\u003c\/li\u003e\n\u003cli\u003eEcuTek, MHD or BM3 calibration work that needs data-backed injector characterisation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy The Same Injector Reads 60% On One Engine And 26% On Another\u003c\/h2\u003e\u003cp\u003eBoth figures are correct because the two engines do not start from the same place. BMW gave the twin-turbo S58 a larger factory injector than the single-turbo Gen 2 B58, so this set is a transformative step on a Gen 2 B58 and a meaningful but smaller step on an S58. If you are cross-shopping with a Supra owner or an M3 owner, that is the number that explains why your results and theirs will not look the same on paper.\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: H720-1996\u003c\/li\u003e\n\u003cli\u003eVehicle Application: BMW S58, BMW B58 Gen 2, Toyota GR Supra A90 and A91\u003c\/li\u003e\n\u003cli\u003eFlow: 1144 cc\/min at 100 bar, 60% over stock B58 Gen 2, 26% over stock S58\u003c\/li\u003e\n\u003cli\u003eFuel Pressure: 350 bar capable\u003c\/li\u003e\n\u003cli\u003eSpray Pattern: OEM equivalent, 8-hole geometry\u003c\/li\u003e\n\u003cli\u003eIncluded Items: comprehensive installation guide and tuning guide with data\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eThese are for S58 and B58 Gen 2 engines only. The earlier Gen 1 B58 runs a 250 bar fuel system and takes the separate \u003ca href=\"\/products\/nostrum-b58-gen-1-stage-1-injectors\"\u003eGen 1 Stage 1 injectors\u003c\/a\u003e, so check which generation your car carries before ordering. A tune is required, and Nostrum's tuning guide covers EcuTek, MHD and BM3. Supra owners should note the engine is BMW-built and shares this part with the German cars. Imported or already-modified vehicles are worth confirming with Hoonies first.\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\u003eH720-1996\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume flow rate (nHeptane)\u003c\/td\u003e\n\u003ctd\u003e1144 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\u003e13.8 g\/s at 100 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow increase over stock B58 Gen 2\u003c\/td\u003e\n\u003ctd\u003e60%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow increase over stock S58\u003c\/td\u003e\n\u003ctd\u003e26%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel pressure capability\u003c\/td\u003e\n\u003ctd\u003e350 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpray pattern\u003c\/td\u003e\n\u003ctd\u003eOEM equivalent, 8 hole geometry\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, EcuTek, MHD or BM3\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\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eVehicle\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eToyota GR Supra A90 \/ A91\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW G-series M3\u003c\/td\u003e\n\u003ctd\u003eS58 3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW G-series M4\u003c\/td\u003e\n\u003ctd\u003eS58 3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW X3 M\u003c\/td\u003e\n\u003ctd\u003eS58 3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW G-series 40i models\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs the Supra part the same as the BMW part?\u003c\/h3\u003e\u003cp\u003eYes. The GR Supra A90 and A91 use BMW's B58 Gen 2, so the same Nostrum set covers both, which is why one part number spans Toyota and BMW cars here.\u003c\/p\u003e\u003ch3\u003eWill these fit a Gen 1 B58 such as a 340i or M240i?\u003c\/h3\u003e\u003cp\u003eNo. The Gen 1 engine runs a 250 bar fuel system and has its own Stage 1 and Stage 2 injector sets. This one is built around the 350 bar system used from Gen 2 onwards.\u003c\/p\u003e\u003ch3\u003eWhat does the tuning guide actually give my tuner?\u003c\/h3\u003e\u003cp\u003eCharacterisation data for the popular suites, so injector behaviour is a known quantity from the first map rather than something dialled in by feel over several sessions.\u003c\/p\u003e","vendor":"Nostrum High Performance","product_type":"High Flow Direct Injectors","created_at":"2026-07-24T13:02:33+01:00","handle":"nostrum-s58-and-b58-gen-2-high-flow-injectors","updated_at":"2026-09-08T18:06:13+01:00","published_at":"2026-07-24T17:57:36+01:00","template_suffix":null,"published_scope":"global","tags":"BMW, BMW M3, BMW M4, BMW X3, BMW X3 M, brand:nostrum-high-performance, cat:fuel, dept:performance-parts, fits:bmw-m3, fits:bmw-m4, fits:bmw-x3, fits:toyota-supra, make:bmw, make:toyota, Toyota, Toyota Supra, type:high-flow-direct-injectors","variants":[{"id":54805979300182,"product_id":11142673334614,"title":"Default Title","price":"2202.27","sku":"H720-1996","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-24T13:02:33+01:00","updated_at":"2026-09-08T18:06:13+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":14231272653142,"product_id":11142673334614,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":83087868887382,"product_id":11142673334614,"position":1,"created_at":"2026-07-24T16:01:39+01:00","updated_at":"2026-07-24T16:01:42+01:00","alt":"Nostrum S58 and B58 Gen 2 High Flow Injectors","width":500,"height":333,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/S58_Inj5_white__60532.1738249166_6b6b74eb-e5fd-4a98-810e-3386cec1e19f.png?v=1784905302","variant_ids":[]}],"image":{"id":83087868887382,"product_id":11142673334614,"position":1,"created_at":"2026-07-24T16:01:39+01:00","updated_at":"2026-07-24T16:01:42+01:00","alt":"Nostrum S58 and B58 Gen 2 High Flow Injectors","width":500,"height":333,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/S58_Inj5_white__60532.1738249166_6b6b74eb-e5fd-4a98-810e-3386cec1e19f.png?v=1784905302","variant_ids":[]}}}