{"title":"M340i\/M440i Fueling","description":"\u003cp\u003ePerformance fueling upgrades for the BMW M340i \/ M440i (G20–G26). Every part listed here fits your car.\u003c\/p\u003e","products":[{"product_id":"jb4-fuel-pressure-upgrade-kit-for-2020-bmw-b58-s58-b58-supra","title":"JB4 Fuel Pressure Upgrade Kit for 2020+ BMW B58\/S58 \u0026 B58 Supra","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eAn upgrade kit that adds a high fuel pressure connection to the JB4 for B58\/B48 Gen2 and S58 platforms, enabling direct control of fuel pressure and fuel trims. Most useful for manual transmission vehicles or those running heavy E85 mixtures on a locked ECU.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIncludes a replacement JB4 board and a fuel pressure connector harness that attaches to your existing JB4 harness\u003c\/li\u003e\n\u003cli\u003eNot compatible with Gen1 B58 motors\u003c\/li\u003e\n\u003cli\u003eCore refund program: customers who purchased their JB4 new from BMS or an authorized reseller can receive a $75 core refund by shipping their original board, purchase receipt, and upgrade kit order number to BMS within 45 days of receiving the upgrade kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x replacement JB4 board\u003c\/li\u003e\n\u003cli\u003e1x fuel pressure connector harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRequires an existing JB4 installed on the vehicle\u003c\/li\u003e\n\u003cli\u003eEasy install — swap in the replacement JB4 board and connect the fuel pressure connector harness to your existing JB4 harness\u003c\/li\u003e\n\u003cli\u003eSee the \u003ca href=\"https:\/\/jb4tech.com\/forum\/model-specific-engine-tuning-modification-discussion\/b58-b48\/843630-jb4-fuel-pressure-control-for-the-gen2-b58\"\u003eJB4 fuel pressure control setup and tuning discussion\u003c\/a\u003e for details\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable\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\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM240i \/ M240xi\u003c\/td\u003e\n\u003ctd\u003eG42\u003c\/td\u003e\n\u003ctd\u003eB58\u003c\/td\u003e\n\u003ctd\u003e2022+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM2\u003c\/td\u003e\n\u003ctd\u003eG87\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2023+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM340i \/ M340xi\u003c\/td\u003e\n\u003ctd\u003eG20\/G21\u003c\/td\u003e\n\u003ctd\u003eB58\u003c\/td\u003e\n\u003ctd\u003e2019+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM3 (incl. Competition)\u003c\/td\u003e\n\u003ctd\u003eG80\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i \/ M440xi (incl. Gran Coupe)\u003c\/td\u003e\n\u003ctd\u003eG22\/G23\/G26\u003c\/td\u003e\n\u003ctd\u003eB58\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM4 (incl. Competition)\u003c\/td\u003e\n\u003ctd\u003eG82\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM4 Convertible\u003c\/td\u003e\n\u003ctd\u003eG83\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2022+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eToyota\u003c\/td\u003e\n\u003ctd\u003eGR Supra Mk5\u003c\/td\u003e\n\u003ctd\u003eA90\/A91\u003c\/td\u003e\n\u003ctd\u003eB58\u003c\/td\u003e\n\u003ctd\u003e2020–2026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Burger Motorsports","offers":[{"title":"B58 Gen2","offer_id":53502672208179,"sku":null,"price":175.0,"currency_code":"USD","in_stock":true},{"title":"S58","offer_id":53502672240947,"sku":null,"price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/B58-Gen2-S58-Fuel-Pressure-Upgrade-Kit.webp?v=1781646647"},{"product_id":"bmw-g-chassis-gen-2-b58-m240i-m340i-m440i-amp-m540i-flex-fuel-ethanol-content-sensor-for-e85-fuel-monitoring","title":"BMW G Chassis Gen 2 B58 M240i, M340i, M440i, \u0026 M540i Flex Fuel Ethanol Content Sensor for E85 Fuel Monitoring","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eFor G-chassis Gen 2 B58 owners running E85 or ethanol blends, this kit gives an accurate real-time read on exactly what's in the tank. A genuine Continental ethanol sensor feeds data out over CANbus with selectable addressing for MHD, BM3, EcuTek, or JB4.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Continental ethanol content sensor with CANbus output\u003c\/li\u003e\n\u003cli\u003eSelectable addressing for MHD, BM3, EcuTek, and JB4\u003c\/li\u003e\n\u003cli\u003eIncludes a 10-bar low fuel pressure sensor for critical monitoring at higher power levels\u003c\/li\u003e\n\u003cli\u003eStainless steel braided fuel lines with protective nylon sheathing\u003c\/li\u003e\n\u003cli\u003eAvailable with a plug-and-play harness or a universal harness — manual transmission and BM3 vehicles require the universal harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Continental ethanol content sensor\u003c\/li\u003e\n\u003cli\u003e10-bar low fuel pressure sensor\u003c\/li\u003e\n\u003cli\u003eStainless steel braided fuel lines with protective nylon sheathing\u003c\/li\u003e\n\u003cli\u003eCANbus ECA (selected variant only)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFull install takes about 30 minutes\u003c\/li\u003e\n\u003cli\u003eAvailable with a plug-and-play harness or a universal harness — manual transmission and BM3 vehicles require the universal harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable\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\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM240i\u003c\/td\u003e\n\u003ctd\u003eG42\u003c\/td\u003e\n\u003ctd\u003eB58\u003c\/td\u003e\n\u003ctd\u003e2022+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM340i\u003c\/td\u003e\n\u003ctd\u003eG20\/G21\u003c\/td\u003e\n\u003ctd\u003eB58\u003c\/td\u003e\n\u003ctd\u003e2019–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i\u003c\/td\u003e\n\u003ctd\u003eG22\/G23\/G26\u003c\/td\u003e\n\u003ctd\u003eB58\u003c\/td\u003e\n\u003ctd\u003e2021–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e540i\u003c\/td\u003e\n\u003ctd\u003eG30\/G31\u003c\/td\u003e\n\u003ctd\u003eB58\u003c\/td\u003e\n\u003ctd\u003e2017–2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Burger Motorsports","offers":[{"title":"Complete Kit with Universal CANbus ECA for BM3 and others","offer_id":53603956097331,"sku":null,"price":449.0,"currency_code":"USD","in_stock":true},{"title":"Complete Kit with Plug \u0026 Play CANbus ECA for Jb4 \u0026 MHD","offer_id":53603956130099,"sku":null,"price":449.0,"currency_code":"USD","in_stock":true},{"title":"Complete Kit with No CANflex ECA for JB4Pro CANFuel \u0026 ReFlex","offer_id":53603956162867,"sku":null,"price":449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/fuel-it-flex-fuel-kit-bmw-g20-m340i-b58-engine-can_V2_1_8cf0da0e-1f64-49e8-b35f-9fb3b71b4919.jpg?v=1783022110"},{"product_id":"precision-raceworks-m3-m4-m340i-m440i-g8x-g2x-stand-alone-afs™-bmw-b58-s58","title":"Precision Raceworks M3\/M4\/M340i\/M440i (G8x\/G2x) Stand Alone AFS™ – BMW B58\/S58","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eOnce you add port injection to a direct-injected M340i\/M440i (B58) or M3\/M4 (S58), the factory low-pressure fuel system becomes the weak link. The factory pump is PWM-controlled to reduce output once target fuel pressure is reached, putting it in constant conflict with any pump trying to feed port injection, and the HPFP's control system dumps fuel back at high pressure\/low volume, causing pressure oscillations. The Precision Raceworks Stand Alone AFS™ solves this by adding a completely dedicated, independent fuel system just for port injection — now with plug-and-play connectors and AN8 adapters, so the factory harness no longer needs to be cut.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFully separate low-pressure fuel system for port injection, independent of the factory pump and PWM control\u003c\/li\u003e\n\u003cli\u003eBillet aluminum top hat with 3 high-flow fuel ports\u003c\/li\u003e\n\u003cli\u003eFully adjustable, 1:1 boost-scalable billet fuel pressure regulator\u003c\/li\u003e\n\u003cli\u003e10-micron USA-made Microglass fuel filter, ideal for E85\u003c\/li\u003e\n\u003cli\u003eSmooth-bore, high-flow PTFE feed and return lines (AN6)\u003c\/li\u003e\n\u003cli\u003ePump options: AFS.425 (single Walbro 450, 425 LPH @ 3 bar), AFS.460 (single Walbro 535, 460 LPH @ 3 bar), AFS.640 (dual Walbro 450s, 640 LPH combined @ 3 bar), AFS.745 (Walbro 450 + Walbro 535, 745 LPH combined @ 3 bar), AFS.800 (dual Walbro 535s, 800 LPH combined @ 3 bar)\u003c\/li\u003e\n\u003cli\u003e100% E85 compatible across all components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWalbro fuel pump(s) per configuration\u003c\/li\u003e\n\u003cli\u003eBillet 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 port injection kits where the fuel rail mounts above the manifold — if running a plate-style spacer PI setup, confirm compatibility before ordering\u003c\/li\u003e\n\u003cli\u003eSome fuel rails may require a Male AN8-ORB to Female AN6-ORB adapter (not included)\u003c\/li\u003e\n\u003cli\u003eIf your tuner wants Solid State Relays, one is needed per pump — see the \u003ca href=\"https:\/\/x58cartel.com\/products\/precision-raceworks-solid-state-relay-upgrade-kit\"\u003eSolid State Relay Upgrade Kit\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eFor the M3\/M4 (G80\/G82, S58), this AFS feeds the port injection setup from the \u003ca href=\"https:\/\/x58cartel.com\/products\/precision-raceworks-s58-port-injection-kit-bmw-g8x-m2-m3-m4\"\u003ePrecision Raceworks S58 Port Injection Kit\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003ePDF install instructions: \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/AFS_Install_Guide_Rev_02.pdf?v=1785356507\"\u003eAFS Install Guide (Rev 02)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eVideo installation instructions: \u003ca href=\"https:\/\/youtu.be\/HpgfUxx2-Ck\"\u003ePRW Stand Alone AFS install (YouTube)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003ePump activation harness instructions (PDF): \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/201-0049_Boost_Reference_Install_Instructions.pdf?v=1785356507\"\u003ePump Activation Harness Install\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eSetting fuel pressure — adjustable regulator (PDF): \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/settingfuelpressure.pdf?v=1785356507\"\u003eSetting Fuel Pressure\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e601-0281 (AFS.425)\u003c\/li\u003e\n\u003cli\u003e601-0282 (AFS.460)\u003c\/li\u003e\n\u003cli\u003e601-0283 (AFS.640)\u003c\/li\u003e\n\u003cli\u003e601-0284 (AFS.745)\u003c\/li\u003e\n\u003cli\u003e601-0285 (AFS.800)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable\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\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM340i \/ M340i xDrive\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2019+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i \/ M440i xDrive\u003c\/td\u003e\n\u003ctd\u003eG22\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2020+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i xDrive Convertible\u003c\/td\u003e\n\u003ctd\u003eG23\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2020+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i xDrive Gran Coupe\u003c\/td\u003e\n\u003ctd\u003eG26\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM3 \/ M3 Competition \/ M3 Competition xDrive\u003c\/td\u003e\n\u003ctd\u003eG80\u003c\/td\u003e\n\u003ctd\u003eS58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM4 \/ M4 Competition \/ M4 Competition xDrive\u003c\/td\u003e\n\u003ctd\u003eG82\u003c\/td\u003e\n\u003ctd\u003eS58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM4 Competition xDrive\u003c\/td\u003e\n\u003ctd\u003eG83\u003c\/td\u003e\n\u003ctd\u003eS58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2022+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Precision Raceworks","offers":[{"title":"AFS.425","offer_id":53710919008563,"sku":"601-0281","price":1499.99,"currency_code":"USD","in_stock":true},{"title":"AFS.460","offer_id":53710919041331,"sku":"601-0282","price":1574.99,"currency_code":"USD","in_stock":true},{"title":"AFS.640","offer_id":53710919074099,"sku":"601-0283","price":1799.99,"currency_code":"USD","in_stock":true},{"title":"AFS.745","offer_id":53710919106867,"sku":"601-0284","price":1874.99,"currency_code":"USD","in_stock":true},{"title":"AFS.800","offer_id":53710919139635,"sku":"601-0285","price":1949.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/SinglePump_NewInstallArm.webp?v=1784932191"}],"url":"https:\/\/x58cartel.com\/collections\/m340i-m440i-fueling.oembed","provider":"x58cartel","version":"1.0","type":"link"}