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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.
Send the vehicle, engine and current setup if you want us to confirm the exact application before checkout.
| Manufacturer | Nostrum High Performance |
| Product Type | Port fuel injectors (PFI) |
| SKU | L071-1084 |
| Set Size | 8 injectors |
| Flow Rate | 670cc/min (63.8 lb/hour) |
| Vehicle Application | GM LS engines with Holley Hi-Ram intake; LS COPO builds |
| Spray Pattern | Targeted for the Hi-Ram intake |
| Tuning Support | Data on request or through a Nostrum dealer |
Eight Nostrum 670cc port fuel injectors built for GM LS engines running a Holley Hi-Ram intake, including LS COPO-style race builds on that manifold. The Hi-Ram puts the injector bosses a long way back from the valve, and a generic port injector aimed for a stock-height manifold will happily wet the runner wall instead of the port. These are spray targeted for that intake, so all 670cc/min (63.8 lb/hr) per injector goes where the tuner expects it. Tuning data is available from Nostrum on request or through a Nostrum dealer, which takes a lot of guesswork out of the first dyno session.
Injector flow and injector aim are separate problems. Fit a large generic injector designed around a factory-height manifold and the cone can land on the runner floor rather than the back of the valve, which shows up as lazy transient response, uneven cylinder-to-cylinder fuelling and a tune that never settles. Nostrum targets the spray for the Hi-Ram plenum height, so the flow increase is usable rather than something the calibration has to work around.
These are chosen by intake and injector height rather than by chassis, so confirm you are on a Holley Hi-Ram manifold and check injector bore length, connector type and rail spacing on your own setup first. Plan the calibration at the same time and request the tuning data through Nostrum or your dealer so your tuner has the characterisation in hand. Running a different manifold? A differently targeted injector will suit it better - see the port fuel injector range or the universal EV14 set of eight.
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.
They are aimed for the Hi-Ram, so on a factory-height intake the spray will not land the same way. Pick an injector targeted for the manifold you actually have.
Yes. Moving from a stock-size LS injector to 670cc changes the fuelling maps completely. Ask Nostrum or your dealer for the injector data before the session so your tuner is not starting from scratch.
Check dimensions, mounting points, clearance and any wiring or hose requirements against your setup before ordering.
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.
