{"product_id":"spool-fx350-hpfp-b58-gen2","title":"Spool Performance FX-350 High-Pressure Fuel Pump — B58 Gen2 (G-Chassis)","description":"\u003cp\u003e\u003cstrong\u003eSpool Performance FX-350 high-pressure fuel pump for the Gen2 B58 — a 350-bar pump that takes the direct-injection side well past Stage 2.\u003c\/strong\u003e It moves the FX-200's volume but at 350 bar (5,000 psi), with a stainless, DLC-coated piston and bore, so rail pressure holds where the factory pump folds.\u003c\/p\u003e\n\u003ch3\u003eWhat it supports\u003c\/h3\u003e\n\u003cp\u003eSpool rates the pump alone at roughly 800 whp on gas, 670 on E50, 600 on E85; with their matched Gen2 injectors about 900\/740\/660; and with injectors plus the high-lift exhaust-cam fuel-lobe mod about 1,050\/950\/800. Single pump, plug-and-play, lifetime warranty.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eHigh-pressure (DI) side; it requires an upgraded low-pressure in-tank pump to keep it fed, and a matching calibration. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eOptions\u003c\/h3\u003e\n\u003cp\u003eSpool offers a wireless ethanol-content analyzer and a 10-micron inline filter as add-ons — tell us if you want either specced in.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eGen2 B58 (G-chassis) — M340i (G20\/G21), M440i (G22\/G23\/G26), M240i (G42), Z4 M40i (G29), X3\/X4 M40i (G01\/G02), 540i (G30), 740i (G11\/G12), 840i (G15\/G16), X5\/X6\/X7 40i (G05\/G06\/G07). Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eSourcing fueling with the tune? The \u003ca href=\"\/products\/fueling-kit-b58\"\u003eFueling Kit — B58\u003c\/a\u003e bundles the matched pump + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"None \/ None","offer_id":43280683040829,"sku":"SP-B58-FX350-NENF15","price":2435.0,"currency_code":"USD","in_stock":true},{"title":"Use my existing \/ None","offer_id":43280683073597,"sku":"SP-B58-FX350-NENF15-UE","price":2435.0,"currency_code":"USD","in_stock":true},{"title":"Include \/ None","offer_id":43280683106365,"sku":"SP-B58-FX350-NENF15-EA","price":2784.0,"currency_code":"USD","in_stock":true},{"title":"None \/ With 10-Micron Filter","offer_id":43280683139133,"sku":"SP-B58-FX350-NENF15-F","price":2584.0,"currency_code":"USD","in_stock":true},{"title":"Use my existing \/ With 10-Micron Filter","offer_id":43280683171901,"sku":"SP-B58-FX350-NENF15-UE-F","price":2584.0,"currency_code":"USD","in_stock":true},{"title":"Include \/ With 10-Micron Filter","offer_id":43280683204669,"sku":"SP-B58-FX350-NENF15-EA-F","price":2933.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/spool-fx350-hpfp-ew03.webp?v=1781742886","url":"https:\/\/essewerks.com\/products\/spool-fx350-hpfp-b58-gen2","provider":"Esse Werks","version":"1.0","type":"link"}