Stage 3 Low-Pressure Fuel Pump Kit

The Spool Performance Stage 3 Low-Pressure Fuel Pump Kit is engineered to overcome the fuel delivery bottlenecks often encountered in high-horsepower BMW S63 builds. As advancements in high-pressure fuel pumps allow for greater direct injection fueling, the stock low-pressure electric pumps can become the limiting factor, particularly when utilizing E85 or other demanding fuels. This kit features a sophisticated boost-activated twin-pump design. A secondary pump engages precisely at boost onset, significantly increasing fuel flow to support builds exceeding 1200 wheel horsepower. This ensures consistent, high-volume fuel delivery under extreme conditions, maintaining reliable performance even with high-demand fuel types. Comprehensive instructions are provided to facilitate a smooth setup process. For optimal operation and to fully leverage the capabilities of this Stage 3 kit, upgrading the low-pressure fuel system is highly recommended, especially for high-horsepower applications. Professional installation is also recommended to ensure proper function.