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Spool Performance Stage 3 low-pressure fuel pump for BMW S58
SPOOL PERFORMANCE

Spool Performance Stage 3 Low-Pressure Fuel Pump — N63TU (550i / 650i)

$815.00

Spool Performance Stage 3 low-pressure fuel pump for the N63TU — the in-tank side that keeps a Stage 3 V8 build fed. The factory in-tank (low-pressure) pumps run out of duty on E85 and high boost, and rail pressure drops up top. Spool's Stage 3 adds a boost-activated secondary in-tank pump, roughly doubling low-pressure flow so a Stage 3 calibration isn't trimming power to stay safe.

What it is

A twin-pump in-tank upgrade (sold as a DIY kit): the factory pump plus a second pump that switches on under boost — it ships with Spool's Hobbs (boost) switch for activation, so cruise stays factory-quiet and the system only ramps when you're on it. Spool rates it to support 1,200+ whp.

Where it fits in the build

Low-pressure (in-tank) side; it pairs with an upgraded high-pressure (DI) pump so the HPFP is never starved. We tune the engine to the fuel system.

Fitment

BMW N63TU — 550i (F10), 650i (F06/F12/F13). Confirm your chassis in the selector.

Fits engine N63TU
Fits chassis F10 · F06 · F12 · F13
Category Fuel
Manufacturer Spool Performance

Ships from Boca Raton, FL.

WHY WE SHIP SPOOL PERFORMANCE
Spool Performance builds high-pressure fuel pumps for the builds that have outrun what the factory pump can flow. On a big-power direct-injection BMW, fuel supply is often the actual ceiling, and the engine will pull rail pressure long before it runs out of airflow. We ship Spool because their HPFP upgrades are aimed squarely at that ceiling, restoring the supply margin a high-output calibration depends on. This is upper-end fueling hardware — the part you add when the dyno shows the pump, not the turbo, is what is holding the number back.