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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.
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| Manufacturer | Nostrum High Performance |
| Product Type | High flow DI injector set |
| SKU | H720-1996 |
| Volume flow rate (nHeptane) | 1144 cc/min at 100 bar |
| Mass flow rate (Viscor 16A) | 13.8 g/s at 100 bar |
| Flow increase over stock B58 Gen 2 | 60% |
| Flow increase over stock S58 | 26% |
| Fuel pressure capability | 350 bar |
| Spray pattern | OEM equivalent, 8 hole geometry |
| Fuel compatibility | Ethanol compatible |
| Tune required | Yes, EcuTek, MHD or BM3 |
| Warranty | Nostrum limited lifetime |
One injector set covers two of the most tuned straight-sixes on the road: BMW's S58 in the G80 M3, G82 M4 and X3 M, the Gen 2 B58 in the G-series 40i cars, and the Toyota GR Supra A90 and A91, which shares the same BMW-built engine. Rated at 1144 cc/min at 100 bar and capable of a 350 bar rail, these Nostrum injectors deliver 60% more flow than a stock Gen 2 B58 injector and 26% more than a stock S58 injector. The 8-hole spray geometry stays OEM equivalent, so a tuner is refining known behaviour rather than starting again. They are ethanol compatible, which is where the extra volume earns its keep, and each set ships with a full installation guide plus a tuning guide carrying data for the popular suites.
Both figures are correct because the two engines do not start from the same place. BMW gave the twin-turbo S58 a larger factory injector than the single-turbo Gen 2 B58, so this set is a transformative step on a Gen 2 B58 and a meaningful but smaller step on an S58. If you are cross-shopping with a Supra owner or an M3 owner, that is the number that explains why your results and theirs will not look the same on paper.
These are for S58 and B58 Gen 2 engines only. The earlier Gen 1 B58 runs a 250 bar fuel system and takes the separate Gen 1 Stage 1 injectors, so check which generation your car carries before ordering. A tune is required, and Nostrum's tuning guide covers EcuTek, MHD and BM3. Supra owners should note the engine is BMW-built and shares this part with the German cars. Imported or already-modified vehicles are worth confirming with Hoonies first.
| Vehicle | Engine |
|---|---|
| Toyota GR Supra A90 / A91 | B58 Gen 2 3.0 |
| BMW G-series M3 | S58 3.0 |
| BMW G-series M4 | S58 3.0 |
| BMW X3 M | S58 3.0 |
| BMW G-series 40i models | B58 Gen 2 3.0 |
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.
Yes. The GR Supra A90 and A91 use BMW's B58 Gen 2, so the same Nostrum set covers both, which is why one part number spans Toyota and BMW cars here.
No. The Gen 1 engine runs a 250 bar fuel system and has its own Stage 1 and Stage 2 injector sets. This one is built around the 350 bar system used from Gen 2 onwards.
Characterisation data for the popular suites, so injector behaviour is a known quantity from the first map rather than something dialled in by feel over several sessions.
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.
