Low Pressure Fuel Pump (LPFP) Upgrades

Low pressure fuel pump upgrades from Spool Performance. The LPFP sits in the tank and supplies the high pressure pump, so it is usually upgraded alongside an HPFP when fuel demand goes up. Spool offers Stage...

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About Low Pressure Fuel Pump (LPFP) Upgrades

Low pressure fuel pump upgrades from Spool Performance. The LPFP sits in the tank and supplies the high pressure pump, so it is usually upgraded alongside an HPFP when fuel demand goes up. Spool offers Stage 2 and Stage 3 pumps, several as DIY kits and bucketless designs.

Fitments include BMW E8x/E9x, N20/N26, N55, B58 Gen 1, G30 540i, S58 (G80, G82, G83, F97, F98), S63 and N63, a long list of Mercedes-AMG models (C63, E63, GT, GT63, G63, GLC63, GLE63, GLS63, S63, SL63, M133, M276 and M278), the Audi EA825 4.0T, McLaren 720S/750S/765LT/GT and the Aston Martin Vantage V8. Check the chassis and engine in the title.

See all fuel system upgrades or the Spool Performance range.

Frequently asked questions

What does a low-pressure fuel pump upgrade do?

The LPFP is the electric pump in the tank that keeps the high-pressure pump fed under every condition. An upgrade adds flow so the high-pressure side is not starved on big power or ethanol, which is when factory in-tank pumps usually run out first.

What does Spool Stage 3 mean?

The Spool Stage 3 kits use a twin-pump layout: the factory-style pump runs normally and a second pump switches on at boost onset, which the listings say nearly doubles the flow of the stock pump. Some cars also need an activation harness, such as the Spool PWM activation harness for BMW.

Do I need an LPFP if I upgrade the HPFP?

Often, yes. A stronger HPFP cannot make up for a low side that cannot feed it, and the Spool FX-350 listings recommend an upgraded LPFP alongside them. Log fuel pressure on both sides: low-side pressure falling first points to the LPFP. Big builds and ethanol blends usually need both. See our HPFP vs LPFP guide.

Is fitting an LPFP kit a DIY job?

It involves opening the fuel tank sender, relieving fuel pressure and working away from sparks with a fire extinguisher at hand. Our fuel pump lock ring guide shows the general technique. If you are not comfortable with fuel work, have a shop fit it.

Does an LPFP upgrade need a tune?

Check with your tuner. The low-pressure kits support higher fuel demand, and they are usually fitted as part of a tuned build or an ethanol conversion, so plan them alongside the calibration.