Spool Stage 3 DIY LPFP — BMW S58 | Built by Boost & Tune

Spool Stage 3 DIY Low-Pressure Fuel Pump – BMW S58

$1,771.00

Pump

Secondary Pump Activation

Spool Stage 3 DIY Low-Pressure Fuel Pump for BMW S58 is a secondary-pump upgrade designed around a simple in-tank bracket system and customer-selectable pump activation.

Walbro 450 or Walbro 525 pump choice
Three secondary-pump activation choices: Hobbs switch, ReFlex plug-and-play or ReFlex flying lead
Supplier states installation uses a compact clip and bracket arrangement in the OEM tank
Hobbs-switch configuration activates the secondary pump at approximately 10 psi
ReFlex flying-lead configuration uses a tuner-controlled ground trigger
ReFlex plug-and-play configuration is intended for compatible full replacement ReFlex harnesses

Fitment: Spool confirms S58 G-chassis fitment. The supplier does not confirm F97/F98 fitment for this DIY kit, so this Built by Boost & Tune listing is routed to G80/G81/G82/G83/G87 applications only.

Important: Spool recommends the Walbro 450 for most applications. The Walbro 525 has higher current draw and should be matched to an appropriate control strategy.

Dispatch: Special order — allow 2–3 weeks.

Product System

Fuel System

Vehicle Fitment

BMW M2 G87 S58
BMW M3 G80 G81 S58
BMW M3 G80 S58
BMW M3 Touring G81 S58
BMW M4 Convertible G83 S58
BMW M4 G82 G83 S58
BMW M4 G82 S58

Confirm chassis, engine, drivetrain and production-year compatibility before ordering.

Available Options

Pump

Walbro 450 (Recommended)
Walbro 525

Secondary Pump Activation

Hobbs switch secondary pump activation
Reflex controller - plug and play secondary pump activation
Reflex controller flying lead secondary pump activation

Supplier Part Numbers

SP-S58-DIYLPFP-450-HOBBS, SP-S58-DIYLPFP-450-REFLEX-PNP, SP-S58-DIYLPFP-450-REFLEX-FLY, SP-S58-DIYLPFP-525-HOBBS, SP-S58-DIYLPFP-525-REFLEX-PNP, SP-S58-DIYLPFP-525-REFLEX-FLY