{"product":{"id":11142678741334,"title":"Nostrum BMW S55 3.0L Stage 3 Twin HPFP And Injector Bundle","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eThis is the largest fuel package Nostrum offers for the BMW S55: the twin Standard Bore Plus high pressure pump kit, flowing 36% more than the factory pumps, together with the Stage 3 direct injector set at 1675 cc\/min each, 85% more than the stock S55 injector and 31% more than the EU5 M5 part. It is built for F80 M3, F82\/F83 M4 and F87 M2 Competition cars that have already moved past bolt-on power and are running big turbos on heavy ethanol blends. Nostrum designs it to stay fully reversible to the factory fuel system, with no modification of OEM parts and no intake trimming.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBig turbo S55 builds where the Stage 2 injector is already at its duty limit on E85.\u003c\/li\u003e\n\u003cli\u003eCars being built once to a final specification rather than upgraded in steps.\u003c\/li\u003e\n\u003cli\u003eTrack and competition S55s where fuelling has to hold at sustained load.\u003c\/li\u003e\n\u003cli\u003eOwners who want the car returnable to its factory fuel system when it is eventually sold.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGoing Past The Stage 2 Injector\u003c\/h2\u003e\u003cp\u003eThe pumps are the same in both S55 bundles. What changes is the injector: 1675 cc\/min instead of 1410, an 85% step over stock rather than 55%. That extra capacity only pays for itself once airflow and ethanol content are both high, which is why the \u003ca href=\"\/products\/nostrum-3-0l-bmw-s55-stage-2-bundle\"\u003eStage 2 bundle\u003c\/a\u003e remains the better answer for most tuned road M cars. Worth checking early: Nostrum lists EcuTek and Bootmod3 for the \u003ca href=\"\/products\/nostrum-bmw-n55-s55-stage-3-di-injectors\"\u003eStage 3 injector\u003c\/a\u003e on its own product page, so confirm the platform with your tuner before ordering.\u003c\/p\u003e\u003ch2\u003eKey Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: Nostrum High Performance\u003c\/li\u003e\n\u003cli\u003eProduct Type: matched twin pump and injector bundle\u003c\/li\u003e\n\u003cli\u003eSKU: H186-2057\u003c\/li\u003e\n\u003cli\u003eVehicle Application: BMW S55 3.0L twin-turbo\u003c\/li\u003e\n\u003cli\u003ePumps: two, 36% over stock flow, 240 bar max operating pressure\u003c\/li\u003e\n\u003cli\u003eInjectors: Stage 3 set of six, 1675 cc\/min at 100 bar, 85% over stock S55\u003c\/li\u003e\n\u003cli\u003eIncluded: twin pump kit, injector set, installation guide, tuning support\u003c\/li\u003e\n\u003cli\u003eExclusions: ethanol sensor is optional and sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eCheck your chassis code against the table below; this package is S55 only. A calibration is required. Plan the install around removing the intake manifold, since the pump kit's spacer, gaskets and extended studs sit beneath it, though Nostrum states no OEM parts are modified and no intake trimming is needed. An ethanol sensor is an optional addition and is the sensible companion if the fuel blend will vary.\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\u003eTwin pump and injector bundle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH186-2057\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Application\u003c\/td\u003e\n\u003ctd\u003eBMW S55 3.0L twin-turbo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePumps supplied\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump flow capacity\u003c\/td\u003e\n\u003ctd\u003e36% over stock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax operating pressure\u003c\/td\u003e\n\u003ctd\u003e240 bar \/ 24 MPa \/ 3500 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInjector flow\u003c\/td\u003e\n\u003ctd\u003e1675 cc\/min at 100 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInjector flow capacity\u003c\/td\u003e\n\u003ctd\u003e85% over stock S55, 31% over the EU5 M5 injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInjector set size\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDecoupling rings\u003c\/td\u003e\n\u003ctd\u003eOEM, pre-installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReversibility\u003c\/td\u003e\n\u003ctd\u003eFully reversible to the factory fuel system, no OEM parts modified, no intake trimming\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning suites\u003c\/td\u003e\n\u003ctd\u003eEcuTek, Bootmod3, MHD\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\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eF80\u003c\/td\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF82\/F83\u003c\/td\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF87\u003c\/td\u003e\n\u003ctd\u003eM2 Competition\/CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eDo I really need Stage 3 injectors?\u003c\/h3\u003e\u003cp\u003eOnly if the car has the airflow to use them. On a stock or lightly upgraded turbo the Stage 2 set is the better match and leaves less to manage in the calibration.\u003c\/p\u003e\u003ch3\u003eCan the car be returned to standard?\u003c\/h3\u003e\u003cp\u003eYes. Nostrum designs the package to be fully reversible to the factory fuel system, with no OEM parts modified and no intake trimming.\u003c\/p\u003e\u003ch3\u003eIs an ethanol sensor included?\u003c\/h3\u003e\u003cp\u003eNo, it is optional. Add one if the car will see changing ethanol content so the tune can track the blend.\u003c\/p\u003e","vendor":"Nostrum High Performance","product_type":"Fuel Systems","created_at":"2026-07-24T13:04:18+01:00","handle":"nostrum-3-0l-bmw-s55-stage-3-bundle","updated_at":"2026-09-08T17:46:10+01:00","published_at":"2026-07-24T17:58:34+01:00","template_suffix":null,"published_scope":"global","tags":"BMW, BMW M2, BMW M3, BMW M4, brand:nostrum-high-performance, cat:fuel, dept:performance-parts, fits:bmw-m2, fits:bmw-m3, fits:bmw-m4, make:bmw, type:fuel-systems","variants":[{"id":54805996339542,"product_id":11142678741334,"title":"Default Title","price":"5340.99","sku":"H186-2057","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-24T13:04:18+01:00","updated_at":"2026-09-08T17:46:10+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":14231281074518,"product_id":11142678741334,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":83087876489558,"product_id":11142678741334,"position":1,"created_at":"2026-07-24T16:02:12+01:00","updated_at":"2026-07-24T16:02:14+01:00","alt":"Nostrum 3.0L BMW S55 Stage 3 Bundle","width":386,"height":386,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/3.0L_BMW_S55_Twin_Standard_Bore_Stage_2_Bundle__96159.1695307307.1280.1280__69457.1764016093.386.513_8d758ffb-2833-4492-a635-647fc24e1464.jpg?v=1784905334","variant_ids":[]}],"image":{"id":83087876489558,"product_id":11142678741334,"position":1,"created_at":"2026-07-24T16:02:12+01:00","updated_at":"2026-07-24T16:02:14+01:00","alt":"Nostrum 3.0L BMW S55 Stage 3 Bundle","width":386,"height":386,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/3.0L_BMW_S55_Twin_Standard_Bore_Stage_2_Bundle__96159.1695307307.1280.1280__69457.1764016093.386.513_8d758ffb-2833-4492-a635-647fc24e1464.jpg?v=1784905334","variant_ids":[]}}}