Available to Order
Not sure which one? Ask us to confirm fitment first →For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. Outside the UK, shipping is shown at checkout and local customs and taxes remain your responsibility.
Some products are made to order, imported or custom built. If timing matters, contact us before ordering and we will confirm the expected delivery timeframe.
Send the vehicle, engine and current setup if you want us to confirm the exact application before checkout.
| Manufacturer | Nostrum High Performance |
| Product Type | High flow direct injectors (DI) |
| SKU | H720-1813 |
| Set Size | 4, serialised batch |
| Engine Application | Subaru FA20DIT 2.0 turbo (direct injection) |
| Flow Increase | 10% over stock |
| Flow Rate | 15.7 g/s (Viscor 16A) / 1302 cc/min (nHeptane) at 100 bar |
| Max Operating Pressure | 150 bar / 15 MPa / 2200 psi |
| Engine Management | Factory ECU; COBB or EcuTek |
| Fuel Compatibility | Ethanol compatible, E85 and gasoline |
| Fuel System Capacity | 620 whp gasoline / 460 whp E85 with full supporting build |
| Warranty | Limited lifetime (manufacturing defects) |
Nostrum's upgraded direct injectors for the FA20DIT, the 2.0 turbo in the 2015-2021 WRX and 2014-2018 Forester XT. They flow 10% more than the factory injector at up to 150 bar and come as a set of four, flow tested and serialised with their tuning data. What matters on this platform is that they stay under stock ECU control, so a WRX chasing more from an intake, intercooler and low pressure pump gets the extra top-end fuel without a secondary injection controller or a methanol tank. The revised part also closes faster than the injector it replaced.
Most routes to more fuel on a direct injected Subaru mean adding a system: port injection with its own controller, or methanol with a tank to fill and nozzles to keep clear. Nostrum's claim is that none of that is needed, because this is the only DI injector upgrade for the FA20F that works with the standard ECU. The outline matches the OE injector and the spray pattern is OEM equivalent, so idle, cold start and drivability behave as the calibration expects.
A direct injection engine is usually pump limited in the mid range and injector limited up top. Nostrum recommends running these alongside the FA20DIT high pressure fuel pump, which flows 37% more than the factory unit, so the boost dialled in early is still supported as the revs climb. Buying both? The Stage 1 bundle is the pre-matched route.
Nostrum lists the 2015-2021 WRX (FA20F, VA chassis) and 2014-2018 Forester XT (FA20E), and states this is not a direct fit for the 2022 WRX, which moved to the FA24F. A tune is not needed to start the car, but Nostrum recommends calibrating after install to keep drivability right. One note when booking that: the current tuning guide matches this part number, and injectors bought before March 2024 under the older number use different data, so check your tuner has the right file. The 620 whp gasoline and 460 whp E85 figures are fuel-system capacity on a fully supported build.
| 2015-2021 | Subaru WRX - FA20F, VA chassis |
| 2014-2018 | Subaru Forester XT - FA20E, 2.0 turbo FA20 engine |
| 2022+ WRX | Not a direct fit (FA24F) |
For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. For customers outside the UK, local customs and taxes remain your responsibility, and shipping is shown at checkout. If a shipping option is not available, email us and we will prepare a tailored quote.
Many of the products we sell are made to order, imported or custom built, so a lead time may apply. If you need a part urgently, contact us before ordering and we will confirm the expected delivery timeframe and process.
Nostrum says a tune is not required to start the car, but recommends calibrating after install to maintain drivability. Book the tuning before you fit them.
No. The FA20 in the BRZ uses a completely different style of direct injector.
On a direct injection engine the injector limit bites at high rpm, where crank angle per injection event runs short. Ten percent there lets the calibrator hold the fuel target at peak power instead of pulling boost.
Use the checked vehicle route, then confirm model year, engine, drivetrain, hardware and existing modifications on the product page or with our team before you commit.
Send us your vehicle, year, current setup and any fitting date, event, trip or deadline before ordering. We will help check fitment, product choice and timing.
