{"product_id":"spool-stage3-lpfp-b58","title":"Spool Performance Stage 3 Low-Pressure Fuel Pump — B58","description":"\u003cp\u003e\u003cstrong\u003eSpool Performance Stage 3 low-pressure fuel pump for the B58 — the in-tank side that keeps a Stage 3 build fed.\u003c\/strong\u003e A big high-pressure pump is only as good as what feeds it; the factory in-tank (low-pressure) pump runs out of duty on E85 and high boost, and rail pressure drops up top. Spool's Stage 3 adds a boost-activated secondary in-tank pump, roughly doubling low-pressure flow.\u003c\/p\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA twin-pump in-tank upgrade: the factory pump plus a second pump that switches on under boost (boost\/Hobbs-switch activated), so cruise stays factory-quiet and the system only ramps when you're on it. Spool rates it to support 1,000+ whp. Built around your bucket — send-your-core, bucket trade-in, and new-build options are available; ask which suits you.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eLow-pressure (in-tank) side; it pairs with an upgraded high-pressure (DI) pump so the HPFP is never starved. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eB58 — M240i (F22), 340i (F30), 440i (F32), M340i (G20), M440i (G22), Z4 M40i (G29), M240i (G42). 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 parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"Send your core","offer_id":43280699392061,"sku":"SP-BMB58G-LPFP-DY","price":1055.0,"currency_code":"USD","in_stock":true},{"title":"Bucket trade-in","offer_id":43280699424829,"sku":"SP-BMB58G-LPFP-DY-BT","price":1254.0,"currency_code":"USD","in_stock":true},{"title":"New bucket build","offer_id":43280699457597,"sku":"SP-BMB58G-LPFP-DY-NB","price":1354.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/Spool__copy-of-g20-g22-g30-g32-g11-g12-b58-stage-3-low-pressure-fuel-pump-diy-kit__1.png?v=1781742211","url":"https:\/\/essewerks.com\/products\/spool-stage3-lpfp-b58","provider":"Esse Werks","version":"1.0","type":"link"}