FX-350 High-Pressure Fuel Pump Kit

The Spool FX-350 is an advanced high-pressure fuel pump engineered to significantly enhance fuel delivery for Mercedes M256 engines, making it an ideal component for high-performance applications. This pump achieves a robust 35Mpa of fuel pressure, which represents a substantial increase over the stock 25Mpa. This elevated pressure results in a 40% boost in fuel flow before reaching the injector's maximum capacity. The FX-350 offers 90% more flow capacity than the stock High-Pressure Fuel Pump (HPFP), making it essential for users looking to run larger turbos and higher ethanol blends, such as E85. This increased fuel flow supports greater power output, improved fuel atomization for more efficient combustion, and potentially better fuel economy and reduced emissions. The complete kit includes the FX-350 Upgraded High-Pressure Fuel Pump, an Ethanol Content Monitor Kit with a mobile app for real-time monitoring, a Bosch Spec 10-Micron High-Flow Fuel Filter, and upgraded fuel lines. These lines are constructed with a black nylon-coated, braided steel PTFE core, ensuring full compatibility with E85 fuel. Calibration changes are mandatory for safe and efficient operation of the FX-350 and must be performed before starting the vehicle to prevent damage and warranty voidance. Spool Performance provides calibration details to tuners and can assist in connecting customers with experienced tuners. It is critical to ensure proper low-pressure fueling to prevent damage to the high-pressure pump's piston and bore, which could void the warranty.