{"product_id":"spool-bmw-b58-gen1-auxiliary-split-fuel-system","title":"Spool BMW B58 Gen 1 Auxiliary Split Fuel System","description":"\u003cp\u003e\u003cstrong\u003eSpool BMW B58 Gen 1 Auxiliary Split Fuel System\u003c\/strong\u003e separates the direct-injection and port-injection fuel feeds for more stable, boost-referenced fueling on higher-output BMW B58 builds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDual Walbro 450 pumps supplied as the base configuration\u003c\/li\u003e\n\u003cli\u003eOptional dual Walbro 525 configuration for higher fuel demand\u003c\/li\u003e\n\u003cli\u003eOEM fuel-pump top-hat integration using precision-machined fittings\u003c\/li\u003e\n\u003cli\u003ePlug-and-play ReFlex controller compatibility\u003c\/li\u003e\n\u003cli\u003eTriple-layer PTFE fuel plumbing with stainless reinforcement\u003c\/li\u003e\n\u003cli\u003eCompact boost-referenced Spool fuel-pressure regulator\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e BMW B58 Gen 1: F22\/F23 M240i, F30\/F31\/F34 340i and F32\/F33\/F36 440i applications listed by Spool.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Spool's solid-state PWM relay harness is a separate option. Confirm pump choice, port-injection controller, injector size and base pressure with the tuner.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDispatch:\u003c\/strong\u003e Special order — allow 3–4 weeks.\u003c\/p\u003e\u003ch3\u003eConfirmed catalogue fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine families:\u003c\/strong\u003e B58\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW chassis:\u003c\/strong\u003e F22, F23, F30, F31, F34, F32, F33, F36\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle models:\u003c\/strong\u003e M240i, 340i, 440i\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFuel-system selection and installation\u003c\/h3\u003e\u003cp\u003eFuel-system parts must be selected around the complete combination of engine generation, fuel type, target output, existing pump and injector configuration, and the calibration strategy. A component appearing for an engine family does not mean it replaces every factory or upgraded fuel-system arrangement used on that engine.\u003c\/p\u003e\u003cp\u003eProfessional installation and calibration are recommended where the product changes fuel pressure, pump control, injector flow, ethanol-content input or port-injection operation. Confirm wiring, plumbing, electrical load, controller requirements and compatible supporting hardware before ordering.\u003c\/p\u003e\u003ch3\u003eBefore ordering\u003c\/h3\u003e\u003cp\u003eSelect your exact BMW through MLAB My Garage and review the product options, included parts and installation requirements. Where a vehicle has been modified from its original engine, transmission or fuel-system specification, contact MLAB with the VIN and current hardware list so the combination can be checked before supply.\u003c\/p\u003e\u003ch3\u003eMLAB support\u003c\/h3\u003e\u003cp\u003eMLAB by Boost and Tune can assist with product selection, workshop installation and dyno calibration for supported BMW applications in Melbourne. Product availability and lead time should be confirmed when ordering supplier-built or special-order components.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"Walbro 450 with check valves","offer_id":49973464039666,"sku":"SP-B58G1AUXF450","price":2830.0,"currency_code":"AUD","in_stock":true},{"title":"Walbro 525 with check valves","offer_id":49973464072434,"sku":"SP-B58G1AUXF525","price":3262.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0845\/4825\/5986\/files\/3_1999ca40-16ac-4445-a59e-509961692026.png?v=1787609985","url":"https:\/\/mlab-boostandtune.com\/products\/spool-bmw-b58-gen1-auxiliary-split-fuel-system","provider":"M Lab by Boost \u0026 Tune","version":"1.0","type":"link"}