Spool Stage 3 LPFP BMW [N55]

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This condition applies to the following product categories:

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• ECE-approved Downpipes

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Spool Stage 3 LPFP | BMW N55

The Spool Performance Stage 3 LPFP is the production version of the Low-Pressure Fuel Pump (LPFP) upgrade for BMW N55 engines. This solution is designed to eliminate low-pressure side limitations, especially with high power and E85 use.

Product Description

As High-Pressure Fuel Pumps (HPFPs) become more efficient, the low-pressure fuel pump often becomes a critical bottleneck. The Stage 3 LPFP solves this with a dual-pump design that offers significantly higher flow capacity.

• Complete plug-and-play unit
• Dual pump system
• Secondary pump activates based on boost pressure
• Nearly 2x flow compared to stock
• Supports over 1200 whp low-pressure side capacity
• Compatible with all fuels, including E85
• No assembly or core returns required

Operating Principle

• Primary pump operates normally under light load
• Secondary pump activates as boost pressure rises
• Provides additional fuel under high loads
• Ensures consistent supply to the high-pressure pump

Why is an upgrade necessary?

The N55 engine's stock LPFP restricts performance in tuned configurations:

• E85 significantly increases fuel consumption
• High power outputs require more flow
• HPFP cannot operate optimally without sufficient supply

Stage 3 LPFP:

• Removes the low-pressure side bottleneck
• Improves system reliability
• Enables extremely high power levels

Note

Overheating of the primary pump connector can be caused by excessive EKP load in the tune. Overloading the primary pump is not recommended, especially in a dual pump solution. Such damages are not covered by warranty as they are not manufacturing defects.