{"product_id":"spool-fx-350-upgraded-high-pressure-pump-gen-1-b58","title":"Spool FX-350 Upgraded High Pressure Pump [Gen 1 B58]","description":"\u003cp\u003e\u003cstrong\u003eSpool Performance\u003c\/strong\u003e is proud to introduce the \u003cstrong\u003eFX350 High-Pressure Fuel Pump\u003c\/strong\u003e, a core upgrade in our fuel system lineup engineered for high-output BMW B58 applications. The FX350 builds on our proven pump architecture to deliver a meaningful increase in fuel delivery across the entire operating range, making it ideal for ethanol blends and larger turbo setups.\u003c\/p\u003e\n\u003cp\u003ePaired with our \u003cstrong\u003eIFX Gen 1 DI injectors\u003c\/strong\u003e, the FX350 enables significantly higher direct-injection fueling capability, opening the door to DI-focused high-horsepower builds on the BMW B58 platform while maintaining OEM-level integration and reliability.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat is the FX350?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eFX350\u003c\/strong\u003e is a high-output, upgraded high-pressure fuel pump designed for enthusiasts pushing beyond the limits of the factory fuel system. It offers a substantial increase in flow over stock, allowing for higher ethanol content, increased boost, and improved fueling stability on upgraded turbo setups.\u003c\/p\u003e\n\u003cp\u003eThe pump is fully \u003cstrong\u003eE85 compatible\u003c\/strong\u003e and \u003cstrong\u003e100% plug-and-play\u003c\/strong\u003e, requiring no cutting, splicing, or permanent modifications. Installation is straightforward and OEM-style, making it an ideal solution for performance builds that demand more fueling without unnecessary complexity.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eAre tune changes required?\u003c\/h3\u003e\n\u003cp\u003eYes. The upgraded pump \u003cstrong\u003edoes require calibration changes\u003c\/strong\u003e. These changes must be applied \u003cstrong\u003ebefore starting the vehicle\u003c\/strong\u003e with the FX350 installed to prevent potential damage and avoid voiding the warranty.\u003c\/p\u003e\n\u003cp\u003eSpool Performance can provide calibration guidance to your existing tuner or help connect you with experienced tuners familiar with our high-pressure fuel pumps. While Spool Performance is strictly a hardware manufacturer and does not provide custom tuning, we are happy to support your tuner with any technical questions related to the pump.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eLow-Pressure Fuel Pump Requirements\u003c\/h3\u003e\n\u003cp\u003eProper low-pressure fueling is \u003cstrong\u003ecritical\u003c\/strong\u003e for the correct operation and long-term durability of high-pressure pumps and DI injectors. The high-pressure pump relies on fuel for lubrication through controlled internal leakage. Insufficient low-side supply can result in piston and bore damage.\u003c\/p\u003e\n\u003cp\u003eDamage caused by low-pressure fuel starvation is detectable and will result in \u003cstrong\u003evoided warranty claims\u003c\/strong\u003e. When planning your build, ensure the low-pressure fuel system is appropriately upgraded to support the FX350 and your overall power goals.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"INCLUDE WIRELESS ETHANOL ANALYZER KIT [+$349] \/ NO DO NOT ADD 10 MICRON FILTER UNIT \/ NO I WILL MODIFY MY EXISTING FUEL LINE","offer_id":47878195183772,"sku":"SP-FX-200-B58-YENFNL656","price":2348.0,"currency_code":"USD","in_stock":true},{"title":"INCLUDE WIRELESS ETHANOL ANALYZER KIT [+$349] \/ NO DO NOT ADD 10 MICRON FILTER UNIT \/ INCLUDE STAINLESS STEEL HIGH PRESSURE FUEL LINE [+99]","offer_id":47878195216540,"sku":"SP-FX-200-B58-YENFYL879","price":2447.0,"currency_code":"USD","in_stock":true},{"title":"INCLUDE WIRELESS ETHANOL ANALYZER KIT [+$349] \/ YES ADD 10 MICRON FILTER UNIT [+$149] \/ NO I WILL MODIFY MY EXISTING FUEL LINE","offer_id":47878195249308,"sku":"SP-FX-200-B58-YEYFNL456","price":2497.0,"currency_code":"USD","in_stock":true},{"title":"INCLUDE WIRELESS ETHANOL ANALYZER KIT [+$349] \/ YES ADD 10 MICRON FILTER UNIT [+$149] \/ INCLUDE STAINLESS STEEL HIGH PRESSURE FUEL LINE [+99]","offer_id":47878195282076,"sku":"SP-FX-200-B58-YEYFYL546","price":2596.0,"currency_code":"USD","in_stock":true},{"title":"DO NOT INCLUDE- I WILL INSTALL MY EXISTING SPOOL WIRELESS ETHANOL ANALYZER KIT \/ NO DO NOT ADD 10 MICRON FILTER UNIT \/ NO I WILL MODIFY MY EXISTING FUEL LINE","offer_id":47878195314844,"sku":"SP-FX-200-B58-EENFNL654","price":1999.0,"currency_code":"USD","in_stock":true},{"title":"DO NOT INCLUDE- I WILL INSTALL MY EXISTING SPOOL WIRELESS ETHANOL ANALYZER KIT \/ NO DO NOT ADD 10 MICRON FILTER UNIT \/ INCLUDE STAINLESS STEEL HIGH PRESSURE FUEL LINE [+99]","offer_id":47878195347612,"sku":"SP-FX-200-B58-EENFYL262","price":2098.0,"currency_code":"USD","in_stock":true},{"title":"DO NOT INCLUDE- I WILL INSTALL MY EXISTING SPOOL WIRELESS ETHANOL ANALYZER KIT \/ YES ADD 10 MICRON FILTER UNIT [+$149] \/ NO I WILL MODIFY MY EXISTING FUEL LINE","offer_id":47878195380380,"sku":"SP-FX-200-B58-EEYFNL2163","price":2148.0,"currency_code":"USD","in_stock":true},{"title":"DO NOT INCLUDE- I WILL INSTALL MY EXISTING SPOOL WIRELESS ETHANOL ANALYZER KIT \/ YES ADD 10 MICRON FILTER UNIT [+$149] \/ INCLUDE STAINLESS STEEL HIGH PRESSURE FUEL LINE [+99]","offer_id":47878195413148,"sku":"SP-FX-200-B58-EEYFYL546","price":2247.0,"currency_code":"USD","in_stock":true},{"title":"DO NOT INCLUDE- I WILL NOT INSTALL ANY ETHANOL ANALYZER \/ NO DO NOT ADD 10 MICRON FILTER UNIT \/ NO I WILL MODIFY MY EXISTING FUEL LINE","offer_id":47878195445916,"sku":"SP-FX-200-B58-NENFNL123","price":1999.0,"currency_code":"USD","in_stock":true},{"title":"DO NOT INCLUDE- I WILL NOT INSTALL ANY ETHANOL ANALYZER \/ NO DO NOT ADD 10 MICRON FILTER UNIT \/ INCLUDE STAINLESS STEEL HIGH PRESSURE FUEL LINE [+99]","offer_id":47878195478684,"sku":"SP-FX-200-B58-NENFYL233","price":2098.0,"currency_code":"USD","in_stock":true},{"title":"DO NOT INCLUDE- I WILL NOT INSTALL ANY ETHANOL ANALYZER \/ YES ADD 10 MICRON FILTER UNIT [+$149] \/ NO I WILL MODIFY MY EXISTING FUEL LINE","offer_id":47878195511452,"sku":"SP-FX-200-B58-NEYFNL122","price":2148.0,"currency_code":"USD","in_stock":true},{"title":"DO NOT INCLUDE- I WILL NOT INSTALL ANY ETHANOL ANALYZER \/ YES ADD 10 MICRON FILTER UNIT [+$149] \/ INCLUDE STAINLESS STEEL HIGH PRESSURE FUEL LINE [+99]","offer_id":47878195544220,"sku":"SP-FX-200-B58-NEYFYL656","price":2247.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0473\/3206\/5436\/files\/S58_fx350_2_d7d8914d-d9d1-43e2-a5ba-95268790faad.jpg?v=1791771359","url":"https:\/\/daroracing.com\/products\/spool-fx-350-upgraded-high-pressure-pump-gen-1-b58","provider":"Daro Racing","version":"1.0","type":"link"}