{"product_id":"precision-raceworks-stand-alone-auxiliary-fuel-system-bmw-g8x-g2x-1","title":"Precision Raceworks Stand Alone Auxiliary Fuel System - BMW G8X\/G2X","description":"\u003cp\u003ePrecision Raceworks' Stand Alone Auxiliary Fuel System (AFS) gives your G8X\/G2X's port injection its own dedicated low-pressure fuel system, separate from the factory main pump.\u003cbr\u003e\u003cbr\u003eOnce a car runs port injection alongside its factory direct injection, the usual approach is to push more fuel through the existing low-pressure system. The problem is that the factory pump is controlled by a PWM controller that pulls output back down once it hits target fuel pressure, and the high-pressure pump dumps fuel back into that same low-pressure system in pulses, causing pressure oscillation that the car's direct-injection system has to keep correcting for. A dedicated AFS sidesteps that entirely: it's a standalone low-pressure circuit built only to feed port fueling, with its own pump, filter, and adjustable regulator.\u003cbr\u003e\u003cbr\u003eWhy a Dedicated AFS\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e  Fuel pressure stays stable regardless of what the main DI fuel system is doing\u003cbr\u003e  Pressure can be scaled 1:1 with boost\u003cbr\u003e  Smaller injectors can be run at higher resolution while still flowing more fuel than larger injectors on the stock system\u003cbr\u003e  Less correction demand on the car's factory DI fueling\u003cbr\u003e  Simplifies tuning of the port injection side\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eConstruction\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e  Billet aluminum top hat with 3 high-flow fuel ports\u003cbr\u003e  Fully adjustable, 1:1-scaling billet fuel pressure regulator\u003cbr\u003e  10-micron, USA-made Microglass fuel filter, rated for E85\u003cbr\u003e  Smooth-bore, high-flow PTFE AN6 feed and return lines\u003cbr\u003e  Billet fittings on all fuel line and top-hat connections\u003cbr\u003e  Plug-and-play connectors inside and outside the top hat, with AN8 fuel-rail adapters included, so the factory harness does not need to be cut or spliced\u003cbr\u003e  Configurable pump activation harness\u003cbr\u003e  100% ethanol-compatible components\u003cbr\u003e  Compatible with a stock or upgraded primary (DI) fuel pump\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eChoosing a Configuration\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eModel\u003cbr\u003eMPN\u003cbr\u003ePump(s)\u003cbr\u003eCombined Flow\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eAFS.425\u003cbr\u003e601-0281\u003cbr\u003e1x Walbro 450\u003cbr\u003e425 LPH @ 3 bar\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eAFS.460\u003cbr\u003e601-0282\u003cbr\u003e1x Walbro 535\u003cbr\u003e460 LPH @ 3 bar\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eAFS.640\u003cbr\u003e601-0283\u003cbr\u003e2x Walbro 450\u003cbr\u003e640 LPH @ 3 bar\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eAFS.745\u003cbr\u003e601-0284\u003cbr\u003e1x Walbro 450 + 1x Walbro 535\u003cbr\u003e745 LPH @ 3 bar\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eAFS.800\u003cbr\u003e601-0285\u003cbr\u003e2x Walbro 535\u003cbr\u003e800 LPH @ 3 bar\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eThese kits are designed for a port injection setup with the fuel rail mounted above the manifold. If you're running a plate-style spacer PI system, contact your BMP Tuning rep to confirm compatibility before ordering.\u003cbr\u003e\u003cbr\u003eWhat's Included\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e  Billet top hat with adjustable 1:1 fuel pressure regulator\u003cbr\u003e  Dedicated fuel pump(s) for the selected configuration\u003cbr\u003e  10-micron Microglass fuel filter\u003cbr\u003e  PTFE AN6 feed and return lines\u003cbr\u003e  Plug-and-play wiring harness and AN8 fuel-rail adapters\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eInstallation Notes\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e  Plug-and-play connectors mean the factory harness does not need to be cut or spliced for installation\u003cbr\u003e  If your tuner wants solid-state relay control, a separate relay kit is needed per pump; a two-pump configuration (AFS.640, AFS.745, or AFS.800) needs two relay kits\u003cbr\u003e  Professional installation and tuning by someone experienced with port injection systems is recommended\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eProduct Specifications\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e  \u003cbr\u003eManufacturer: Precision Raceworks\u003cbr\u003e  \u003cbr\u003eRecommended Base Pressure: 43.5 psi-g\u003cbr\u003e  \u003cbr\u003eMaximum Fuel Pressure: 110 psi-g\u003cbr\u003e  \u003cbr\u003eFuel Output Ports: 2\u003cbr\u003e  \u003cbr\u003eFuel Return Ports: 1\u003cbr\u003e  \u003cbr\u003eSystem Weight: 11 lbs (single-pump configurations) or 14 lbs (dual-pump configurations), including lines and harness\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eFrequently Asked Questions\u003cbr\u003e\u003cbr\u003eDo I need to cut my factory wiring harness to install this?No. This system uses plug-and-play connectors and included AN8 fuel-rail adapters, so no cutting or splicing is required.\u003cbr\u003e\u003cbr\u003eWhich configuration do I need?It depends on your port injection fuel demand and tune. Contact your BMP Tuning rep or your tuner to confirm the right AFS size for your build.\u003cbr\u003e\u003cbr\u003eDoes this replace my main fuel pump?No. It's a dedicated, standalone system for port injection only, and works alongside your stock or upgraded primary DI fuel pump.\u003cbr\u003e\u003cbr\u003eIs this compatible with E85?Yes. Every component in the kit, including the filter media, is rated for 100% ethanol.\u003c\/p\u003e","brand":"Precision Raceworks","offers":[{"title":"Default Title","offer_id":43595890065456,"sku":"P07W 601-0281","price":1499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/4573\/7776\/files\/NEWFUELPUMPSETUP-1_a8855fe1-a630-4b91-bbe5-f234ebcadf1c.jpg?v=1788953185","url":"https:\/\/3pedalsbetter.com\/products\/precision-raceworks-stand-alone-auxiliary-fuel-system-bmw-g8x-g2x-1","provider":"3Pedals Better","version":"1.0","type":"link"}