Spool Stage 3 Low Pressure Fuel Pump - DIY Kit [S63 | F90 M5]

Spool Performance is excited to introduce our Stage 3 Low-Pressure Fuel Pump DIY Kit for the BMW F90 M5 S63, designed for enthusiasts who prefer a hands-on solution to their fueling challenges. As high-pressure fuel pumps now support greater Direct Injection (DI) fueling, the stock low-pressure electric pumps have become a limiting factor when pursuing high horsepower—especially with E85 fuel.

The DIY Kit offers comparable performance to plug-and-play kits at a fraction of the cost. It includes all the components needed to add a secondary boost-activated low-pressure pump, effectively doubling the flow capacity of the stock setup. This ensures more than enough fueling to support over 1200whp, regardless of fuel type.

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Key Features:

• Boost-activated Twin Pump Design: A second pump activates during boost to meet high-demand fueling needs.
• Cost-effective DIY Solution: Delivers the same performance as pre-assembled kits at a reduced cost.
• Supports High Power: Perfect for builds exceeding 1200whp, ideal for E85 applications.
• User-friendly Assembly: Comes with detailed instructions for an easy installation process.

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Kit Contents:

1. Secondary Fuel Pump Assembly
2. Secondary Fuel Pump Activation Harness
3. Boost-activated Switch
4. Boost Reference Adapter
5. Hardware Pack