{"product_id":"precision-raceworks-x3-x3m-g01-f97-stand-alone-afs™-bmw-b58-s58","title":"Precision Raceworks X3\/X3M (G01\/F97) Stand Alone AFS™ – BMW B58\/S58","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eOnce you add port injection to a direct-injected X3 M40i (B58) or X3 M (S58), the factory low-pressure fuel system becomes the weak link. The factory pump is controlled by PWM designed to reduce output once target fuel pressure (typically 5 bar) is reached — which puts it in constant conflict with any upgraded or added pump trying to feed port injection. On top of that, the high-pressure pump's control system dumps fuel back into the low-pressure system at high pressure\/low volume, causing pressure oscillations that limit how consistently an upgraded pump can perform.\u003c\/p\u003e\n\u003cp\u003eThe Precision Raceworks Stand Alone AFS™ (Auxiliary Fuel System) solves this at the source: instead of trying to make the factory low-pressure system do double duty, it adds a completely dedicated, independent fuel system just for your port injection setup. Now featuring plug and play connectors and AN8 adapters, so it's no longer necessary to cut the factory harness.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated system:\u003c\/strong\u003e A fully separate low-pressure fuel system for port injection — completely independent of the factory pump and its PWM control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet top hat:\u003c\/strong\u003e Billet aluminum top hat with 3 high-flow fuel ports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully adjustable regulator:\u003c\/strong\u003e 1:1 boost-scalable billet fuel pressure regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiltration:\u003c\/strong\u003e 10-micron USA-made Microglass fuel filter, ideal for E85\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLines:\u003c\/strong\u003e Smooth-bore, high-flow PTFE feed and return lines (AN6)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump Selection:\u003c\/strong\u003e AFS.460 — single Walbro 535, 460 LPH @ 3 bar; AFS.800 — dual Walbro 535s, 800 LPH combined @ 3 bar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% ethanol compatible:\u003c\/strong\u003e All components rated for full E85 compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWalbro fuel pump(s) per selected configuration\u003c\/li\u003e\n\u003cli\u003eBillet aluminum top hat and fuel pressure regulator\u003c\/li\u003e\n\u003cli\u003e10-micron Microglass fuel filter\u003c\/li\u003e\n\u003cli\u003ePTFE feed\/return lines and fittings\u003c\/li\u003e\n\u003cli\u003eConfigurable pump activation harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for use with a port injection kit where the fuel rail is mounted above the manifold. If you're running a plate-style spacer PI setup, contact Precision Raceworks directly before ordering to confirm compatibility.\u003c\/li\u003e\n\u003cli\u003eSome fuel rails may require a Male AN8-ORB to Female AN6-ORB adapter for compatibility (not included).\u003c\/li\u003e\n\u003cli\u003eAt time of install, some wiring may need to be cut and spliced to connectors included in this kit on older models.\u003c\/li\u003e\n\u003cli\u003eIf your tuner wants \u003ca href=\"https:\/\/x58cartel.com\/products\/precision-raceworks-solid-state-relay-upgrade-kit\"\u003eSolid State Relays\u003c\/a\u003e, one kit is needed per pump.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0540\/5596\/0769\/files\/AFS_Install_Guide_Rev_02.pdf?v=1720206382\" target=\"_blank\"\u003ePDF Instructions - Click Here\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/youtu.be\/HpgfUxx2-Ck\"\u003eVideo Instructions - Click Here\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0540\/5596\/0769\/files\/201-0049_Boost_Reference_Install_Instructions.pdf?v=1704485496\" target=\"_blank\"\u003ePump Activation Harness - Click Here\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0540\/5596\/0769\/files\/settingfuelpressure.pdf?v=1711739070\" target=\"_blank\"\u003eSetting Fuel Pressure - Adjustable Regulator\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0540\/5596\/0769\/files\/2020_X3M_AFS_Wiring_10.08.25.jpg?v=1759960071\" target=\"_blank\"\u003eWiring diagram for early 2020 and older\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e 601-0338 (AFS.460) \/ 601-0336 (AFS.800)\u003c\/p\u003e\n\u003ch2\u003eVehicle Application\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%; text-align: left;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX3 M40i\u003c\/td\u003e\n\u003ctd\u003eG01\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2018–present\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX3 M\u003c\/td\u003e\n\u003ctd\u003eF97\u003c\/td\u003e\n\u003ctd\u003eS58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2019–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Precision Raceworks","offers":[{"title":"AFS.460","offer_id":53710917042483,"sku":"601-0338","price":1574.99,"currency_code":"USD","in_stock":true},{"title":"AFS.800","offer_id":53710917140787,"sku":"601-0336","price":1949.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/TopHat_Pump.webp?v=1784935171","url":"https:\/\/x58cartel.com\/products\/precision-raceworks-x3-x3m-g01-f97-stand-alone-afs%e2%84%a2-bmw-b58-s58","provider":"x58cartel","version":"1.0","type":"link"}