Fuel-It! Stage 3 Dual LPFP — N55 / N20 (F-Chassis)
Fuel-It! Stage 3 dual low-pressure fuel pump for the F-chassis N55/N20 — the high-power, E85 answer on the in-tank side. Instead of replacing the stock pump, it keeps the factory primary (so the EKP behaves normally) and adds a second Walbro that runs only under boost.
What it is
A dual-pump kit: the stock LPFP plus a secondary Walbro 450 (525 optional) on a secondary harness, triggered under boost by a Hobbs switch — so cruise stays factory and the system only ramps when you're on it. This sidesteps the current-draw limit of a single big pump.
Options
Two choices in the configurator. Secondary Pump: the Walbro 450 covers most Stage 3 E85 builds; step up to the higher-flow Walbro 525 for bigger power targets. Trigger: a Hobbs switch is a boost-pressure switch that brings the secondary pump online at its rated boost — the 4 PSI switch brings it in early, low in the boost curve, while the 15 PSI switch brings it in higher up. Choose "No Hobbs switch" if your build switches the secondary pump another way.
Where it fits in the build
Low-pressure (in-tank) side; feeds an upgraded high-pressure pump on a Stage 3 build. We tune the engine to the fuel system.
Fitment
F-chassis N55/N20 — F20/F21, F22/F23, F87 M2, F30/F31, F32/F33. Confirm your chassis in the selector.
Sourcing fueling with the tune? The Fueling Kit — N55 bundles the matched parts + calibration for 8% under à la carte.