Spool Stage 3 Low-Pressure Fuel Pump – BMW F91/F92/F93 M8 S63

Spool Performance Stage 3 Low-Pressure Fuel Pump Kit for the BMW F91, F92 and F93 M8 S63 platform. Part number: SP-M8-LPFP-5656.

Developed to address low-side fuel delivery limitations in high-output direct-injection builds, this kit adds a secondary low-pressure pump that activates as boost comes on. The twin-pump arrangement increases available fuel flow over the factory system and is intended for demanding high-power and ethanol-fuelled applications.

Key features

• Secondary boost-activated pump for additional low-pressure fuel supply.
• Spool states support for 1200+ wheel horsepower of low-pressure fuelling; actual capability depends on the complete fuel system, fuel, calibration and operating conditions.
• Designed for BMW F91/F92/F93 M8 S63 applications.
• Plug-and-play-oriented installation with the included supporting components.

Kit contents

• Dual-pump bucket assembly.
• Secondary fuel-pump activation harness.
• Boost-activated switch and boost-reference adapter.
• Installation hardware pack.

Fitment and installation

Confirm the exact vehicle, fuel-system configuration and required supporting upgrades before ordering. The kit is not a substitute for adequate high-pressure fuel delivery, wiring, fuel-line capacity or a suitable ECU calibration. Professional installation and fuel-pressure validation are recommended.

M Lab by Boost & Tune can assist with the fuel-system specification, installation and calibration requirements for your BMW performance build. Contact us for current availability and lead-time confirmation.