BMW E9x/E8x Low Pressure Bucketed Fuel Pump Expansion Modules (Stage 3-4)

The Precision Raceworks BMW E9x/E8x Low Pressure Bucketed Fuel Pump Expansion Modules (Stage 3-4) are designed for customers looking to run all blends of E85. All pump options below include Genuine Walbro 450, Walbro 525, or Walbro 535 fuel pump(s) capable of flowing up to 350% more fuel than the factory fuel pump, and all options are 100% E85 compliant. These expansion modules require customers to already own a Stage 2 or 2.5 Precision Raceworks Pump. Stage 3 (5.65 liters per minute) Our Stage 3 bucketed module will add a Walbro 450 pump to your existing PR Stage 2 or 2.5 kit. This upgrade includes all necessary hardware and wiring to support up to 1000whp* (Rated for 875whp on 100% E85). Stage 3.5 (6.4 liters per minute) The Stage 3.5 pump module adds a Walbro 525 pump to your existing PR Stage 2 or 2.5 kit. This upgrade module will include all necessary hardware and wiring to upgrade your pump to Stage 3.5 or 3.75. Once combined with your existing kit, this pump combination can