Spool FX-170 Upgraded High Pressure Pump Kit [S63 Gen 1]

Spool Performance FX-170 High-Pressure Fuel Pump Upgrade – Gen 1 S63 What is the FX-170? The FX-170 is a high-performance upgraded high-pressure fuel pump (HPFP) designed for the Gen 1 S63 engine. Featuring a larger bore size than stock, it delivers 50% more fuel flow, significantly increasing fueling capacity for big turbo setups and high-boost applications. The FX-170 is fully E85 compatible and plug-and-play, requiring no cutting or splicing for installation. Additionally, it operates at 25% higher pressure than stock, allowing injectors to flow more fuel per injection cycle, optimizing power and efficiency. Why Do You Need It? The factory HPFP on the Gen 1 S63 engine is severely limited when tuning for higher horsepower and ethanol blends. The FX-170 eliminates this bottleneck by:✔ Boosting fuel flow by 50%, allowing for higher ethanol blends and big turbo support✔ Increasing injector output, raising the fueling limits of the platform✔ Enhancing stability and reliability, ensuring