Nostrum Performance Fuel System Parts

The best Nostrum Performance part in this collection is the Nostrum Performance High Pressure Fuel Pump for the 2015-2021 WRX: an upgraded pump for the direct-injected FA engine in that car. If a tuned 2015-2021 WRX is running into fuel delivery limits on the factory pump, this is the piece this shelf is built around.

On a direct-injection engine, fuel is sprayed straight into the cylinders at very high pressure, and the engine-driven high pressure fuel pump creates that pressure. When tuning raises boost and fuel demand, the factory pump can become the ceiling: the engine asks for more fuel than it can deliver at pressure. An upgraded pump raises that ceiling so the fuel system and calibration have room to work. It is a supporting modification, not a bolt-on power gain, and fitment is specific: the title names the 2015-2021 WRX only, so check your year and model.

Plan the rest of the system in the Fuel Systems range, and read our product highlight on the 2015+ FA engine WRX for the platform context behind this pump.

Brands to know

Nostrum Performance is represented here by this high pressure fuel pump for the 2015-2021 WRX: direct-injection fueling hardware for engines whose factory pump runs out of headroom under tuning. Its shelf is deliberately narrow, aimed at the component that limits direct-injected builds first.

DeatschWerks covers the in-tank side of the same system, known for fuel pumps and injectors sized by flow rate. Owners cross-shop it when the low-pressure supply feeding a high pressure pump also needs upgrading, since the two pumps work as a chain.

Fuel Injector Clinic is the injector specialist alongside it, known for injectors matched and supplied with flow data. On direct-injected cars like this WRX it frames the comparison, because the high pressure pump, not a conventional injector swap, is usually the first fueling upgrade.

Radium Engineering covers the precision plumbing around the pump, with fuel rails, surge tanks, regulators, and fittings in this catalog. Builders visit it when a fueling upgrade grows into a full system where lines, filtration, and pressure control are planned together.

COBB Tuning provides the calibration context, known for the Accessport and tuning support on the WRX platform. A higher-capacity pump only helps when the tune can use it, so owners check COBB for whether their calibration path supports the hardware.

FAQ

Which cars does this fuel pump fit?

The product title names the 2015-2021 WRX only. Check your year and model against the listing before ordering, and do not assume fitment for the STI or other Subaru models, which use different fuel systems.

Does a high pressure fuel pump add power by itself?

No. It raises the fuel delivery ceiling so a tune can safely use more fuel; on a stock calibration it is a supporting part, not a power adder. The gain comes from the tuning headroom it unlocks.

Will this pump need a tune?

Fuel delivery changes should be matched by calibration, so plan on tuning support and confirm requirements with your tuner before installing.

What else should I check when upgrading fueling?

Look at the whole chain: in-tank supply, lines, filtration, and existing hardware condition. A high pressure upgrade works best when the low-pressure side feeding it is healthy.