{"product_id":"precision-raceworks-stand-alone-afs-for-bmw-m3-m4-g8x-s58-twin-turbo-2021-2023","title":"Precision Raceworks Stand Alone AFS for BMW M3\/M4 G8x S58 Twin Turbo 2021-2023","description":"\u003cp\u003e\u003cstrong\u003eFits (per Precision Raceworks, checked by our tech team):\u003c\/strong\u003e BMW M3 (G80, S58) 2021-2023; BMW M4 (G82\/G83, S58) 2021-2023\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFrom Precision Raceworks:\u003c\/strong\u003e NOW FEATURING PLUG AND PLAY CONNECTORS and AN8 Adapters for your fuel rail! Now it is no longer necessary to cut your factory harness!. The Precision Raceworks M3\/M4\/M340i\/M440i (G8x\/G2x) Stand Alone AFS ™ is the highest performing and most stable low pressure fuel system on the market!\u003c\/p\u003e\u003cp\u003eForget about how things have been done and embrace the benefits of dedicated fueling for your port injection! Since direct injection came out for BMW, enthusiasts have been adding port injection. With this came the need to upgrade the low-pressure fuel system to keep up.\u003c\/p\u003e\u003cp\u003eHistorically this was done by increasing the output of the main fuel system. Unfortunately, the main fuel pump is controlled using PWM by a factory programmed controller designed to reduce output when target fuel pressure (typically 5 bar) is exceeded, creating a constant battle when pumps are added or upgraded. This limits upgraded fuel pumps from performing to their full potential.\u003c\/p\u003e\u003cp\u003eAdditionally, the high pressure pump control system dumps fuel back into the low pressure system at high pressure low volume resulting in oscillations of the low pressure fuel system. Because of this the DI system in the car is required to constantly make corrections to keep target AFR in check.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Precision Raceworks\u003cbr\u003e\u003cstrong\u003ePart #:\u003c\/strong\u003e 601-0281, 601-0282, 601-0283, 601-0284, 601-0285\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShipping calculated at checkout.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThis part can't ship to California (CARB).\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNot sure it fits? Call the shop with your VIN: \u003ca href=\"tel:+14059063935\"\u003e(405) 906-3935\u003c\/a\u003e.\u003c\/p\u003e","brand":"Precision Raceworks","offers":[{"title":"AFS.425","offer_id":67964903620823,"sku":"601-0281","price":1499.99,"currency_code":"USD","in_stock":true},{"title":"AFS.460","offer_id":67964903653591,"sku":"601-0282","price":1574.99,"currency_code":"USD","in_stock":true},{"title":"AFS.640","offer_id":67964903686359,"sku":"601-0283","price":1799.99,"currency_code":"USD","in_stock":true},{"title":"AFS.745","offer_id":67964903719127,"sku":"601-0284","price":1874.99,"currency_code":"USD","in_stock":true},{"title":"AFS.800","offer_id":67964903751895,"sku":"601-0285","price":1949.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0852\/0355\/0423\/files\/SinglePump_NewInstallArm.jpg?v=1793660534","url":"https:\/\/speedhausparts.com\/products\/precision-raceworks-stand-alone-afs-for-bmw-m3-m4-g8x-s58-twin-turbo-2021-2023","provider":"SPEEDhaus Parts","version":"1.0","type":"link"}