Spool Stage 3 DIY LPFP BMW G30 540i [B58 Gen.1]

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Spool Stage 3 DIY LPFP | BMW G30 540i (B58 Gen.1)

The Spool Performance Stage 3 DIY LPFP is a low-pressure fuel pump (LPFP) upgrade kit for the BMW G30 540i B58 Gen1 engine. This solution is aimed at enthusiasts who want an efficient and cost-effective DIY solution to eliminate fuel system bottlenecks.

Product Description

As high-pressure fuel pump (HPFP) capacities increase, the low-pressure fuel pump often becomes a limiting factor, especially at high power levels and when using E85.

The Stage 3 DIY kit solves this by adding a secondary fuel pump to the system, activated by boost pressure.

• Nearly 2x the flow compared to stock
• Supports over 1200 whp low-pressure capacity
• Works with all fuels, including E85
• Significantly more affordable than plug & play solutions

Operating Principle

• Secondary pump activates according to boost pressure
• Increases fuel delivery as load increases
• Ensures sufficient supply to the HPFP system

Why is an upgrade necessary?

The standard LPFP of the B58 Gen1 engine is insufficient for demanding setups:

• High power and ethanol blends increase fuel demand
• Insufficient supply limits HPFP operation

Stage 3 LPFP:

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

Installation

• DIY solution (self-assembly)
• Clear installation instructions included
• Not fully plug & play

Package Contents

• Dual Pump Bucket assembly
• Secondary pump activation wiring harness
• Boost pressure controlled switch
• Boost reference adapter
• Installation hardware kit