SPOOL F-Series S55 High Performance Fuel Pump - Stage 3 & Stage 4 - 900WHP+

Spool Performance S55 High-Performance Fuel Pump Kits

Give your S55 the fuel supply it needs as power levels climb. The Spool Performance F-Series S55 Fuel Pump Kits support everything from pump gas to full E85, with two stages to match your build.

Each kit pairs an OEM brushless pump inside the factory-style bucket with an auxiliary pump mounted inside.

Kits include a fuel level sending unit (OEM FUEL PUMP), plug-and-play wiring, and a boost-activated switch that brings the auxiliary pump online at 10 psi or you can choose ReFlex ground activation harness. No cutting, splicing, or crimping required, and no core charge.

Stage 3 — Up to 900 WHP

A straightforward fuel supply upgrade for an S55 running more boost and higher ethanol content. Stage 3 combines the OEM brushless pump with a DW420 in the bucket (EASY INSTALL).

Power support: Up to 900 WHP, or 850 WHP on full E85

What’s included:

• Genuine OEM fuel pump bucket assembly
• OEM brushless pump with in bucket DW420 (no outside bracket, easy installation)
• Fuel level sending unit 
• Plug-and-play boost activation harness or ReFlex (please email sales@spoolperformance.us if you want ReFlex)
• 10 psi Hobbs switch

Stage 4 (Return Style Fuel System/AFS) — Up to 1,000 WHP

Stage 4 builds on the dual-pump setup with upgraded fuel plumbing, an inline filter, and a regulated return system. It pairs the OEM brushless pump with a genuine DW420 in the bucket (EASY INSTALL).

Power support: Up to 1,000 WHP, or 950 WHP on full E85

Contact us to purchase a 1200WHP system - sales@spoolperformance.us

What’s included:

• Genuine OEM fuel pump bucket assembly
• OEM brushless pump with in bucket DW420 (no outside bracket, easy installation)
  
• Fuel level sending unit
• Upgraded -6 AN fuel feed and return lines
• 1:1 genuine Radium Engineering compact fuel pressure regulator
• New inline fuel filter
• ReFlex Activation Harness

E85-compatible components. Plug-and-play wiring. No core charge. Choose the stage that fits your power goals.

Power ratings are estimates and depend on fuel blend, operating pressure, electrical supply, and the rest of the vehicle’s fuel system.