BMW G30 540i B58 Spool Stage 3 Low Pressure Fuel Pump DIY Kit

The Spool Stage 3 low pressure fuel pump DIY kit for the BMW G30 540i B58 is a plug-and-play way to add a second in-tank pump, with no drilling or cutting of the fuel bucket.

Why you need it

A proprietary three-piece bracket locks into the factory fuel tank assembly for a true drop-in install, and the supplied hoses and fittings simply tee into the factory fuel line. The second pump comes in under boost, so the low side keeps up on high-power B58 builds.

Fits

• BMW G30 540i (B58)
• Other G-chassis BMW B58 models (bracket varies by tank)

Features

• No drilling or cutting of the fuel bucket
• Three-piece bracket that locks into the factory tank assembly
• Tees into the factory fuel line with included fittings
• Walbro 450 or Walbro 525 pump options
• Three harness options to suit your setup

Good to know

Provide your year, model or VIN when ordering so the correct tank bracket is supplied; the bracket shown may differ. Choose your pump and harness at checkout. The Walbro 450 suits most builds; the 525 is for higher power and should be paired with the Spool PWM harness, since the standard relay can overload in hot climates. The Hobbs switch harness uses the included 10 psi switch for cars without a Reflex controller; the Reflex plug-and-play and flying lead harnesses connect to Reflex Auxiliary Output 2. Professional installation is recommended.