Injector Dynamics 1050x Fuel Injectors for 12-15 Civic Si

Injector Dynamics ID1050X Fuel Injectors - 2012-2015 Civic Si (K24Z7)

Factory injectors on a 9th gen Si are fine until they aren't. Add airflow, add boost, or switch to E85 and they become the thing limiting the car. This is Injector Dynamics' ID1050X, sized to drop into the K24Z7 rail without spacers, high impedance so nothing else changes electrically, and backed by published characterization data so your tuner can scale them properly rather than guessing.

With Or Without Pigtails

Pick your configuration at checkout.

With pigtails (IJD-1050-K24Z-PNP) includes plug and play harnesses that adapt the USCAR connector to your factory 2012 and later wiring. No cutting, no splicing, and no connection to second-guess later.

Without pigtails (IJD-105007214814) is injectors alone, which is the right pick if you've already got adapters sorted from a previous set.

On a fuel system, a clean electrical connection matters more than most places. If you don't already have adapters, the pigtail version is worth the small difference.

Published Data Is The Real Advantage

This is what separates a proper injector from a big one.

Injector Dynamics publishes full characterization data for the ID1050X, which means your tuner enters actual measured values rather than approximating from a similar injector file. That shows up as accurate fueling across the whole range, not just at full load.

The difference is most obvious at short pulse widths. Plenty of large injectors idle poorly because nobody characterized them properly at low duty. These don't, which is why a car running them behaves at a stoplight as well as it does at redline.

Fits Without Spacers

The ID1050X uses a compact 48mm body designed to package in the factory rail and manifold without spacers or modification.

That keeps the fuel rail where it belongs and the install straightforward. The connector is USCAR, which is what the pigtail option addresses if your harness needs adapting.

Any Fuel, Including E85

Corrosion resistant internals mean compatibility with all known fuels and a considerably longer service life on ethanol.

That matters on a 9th gen Si, since E85 is where a lot of these builds end up. Injectors that weren't designed for it degrade internally over time, and you end up replacing a set you thought was sorted. These aren't affected by what you run.

1065cc At 3 Bar, Rated To 10

The nominal rating is 1065cc/min at 3.0 bar (43.5 psi), measured with gasoline at 52°C. That's the standard test condition and the figure your tuner will want.

Maximum differential fuel pressure is 10.0 bar (145 psi), which gives real headroom on a boosted build where base pressure rises with boost. An injector running near its ceiling behaves unpredictably, and margin is what keeps it consistent.

High Impedance, No Resistor Box

These run directly off your factory injector circuit. No resistor box, no additional drivers, and no changes to how your ECU controls fuel.

Get The Tune Right

Treat this like the fueling change it is.

Your tuner needs to update injector scaling and offset using the correct Injector Dynamics data for the ID1050X specifically, not a close-enough file from a similar injector. That's the whole point of buying an injector with published data.

Also confirm your fuel system supports what you're asking of it. The 10 bar pressure limit is real, and your pump, regulator, lines, and filter need to handle the pressure and flow you're targeting. An injector this size feeding off a stock pump is a bottleneck moved rather than removed.

Replaceable Inlet Filter

The inlet filter can be replaced rather than being integral to the injector, which means a contaminated set can be serviced instead of scrapped. Useful on a car where the fuel system isn't always as clean as you'd like to believe.

Fitment

2012-2015 Honda Civic Si (K24Z7)

Set of four injectors. Part numbers IJD-1050-K24Z-PNP (with pigtails) or IJD-105007214814