Injector Dynamics Fuel Injectors for Subaru

• Injector Dynamics for Subaru WRX / STI
• Injector Dynamics for Subaru BRZ

• ID1050x fuel injectors
• ID1300x fuel injectors
• ID1750x fuel injectors
• ID2600x fuel injectors

The ID1050x is our default recommendation for most EJ and FA-powered Subarus. It covers the bulk of bolt-on and lightly built turbo setups on 98 RON, and handles moderate boost E85 builds without pushing duty cycle into unsafe territory. For bigger builds, the ID1300x, ID1750x and ID2600x step up the flow for high-boost E85, methanol, or dedicated time attack combinations.

The naturally aspirated FA20 in the BRZ is a different animal to the turbocharged EJ. Most BRZ builds we see running Injector Dynamics have already added a turbo or supercharger kit, since the factory FA20 injectors have next to no spare capacity once forced induction is on the table. We size these jobs around the specific kit and fuel choice rather than a generic recommendation, so talk to us about your combination before ordering.

What sold us on Injector Dynamics over cheaper alternatives is the characterisation data. Every set comes with data your tuner can load straight into Haltech, Link, MoTeC or a factory ECU reflash, so the car fuels correctly from the first start-up instead of a week of trial and error on the dyno.

Check your fuel rail and injector clip compatibility before you order. Some EJ and FA applications need adapter tops or a different injector length depending on the rail you're running, factory or aftermarket.

Return and returnless fuel systems behave differently under load. If your car is still on the factory returnless setup, talk to us about whether it can support the injector size you're after, or whether a return-style fuel system upgrade needs to happen alongside it.

Injector clocking (the angle of the spray pattern relative to the intake port) matters on some manifolds. Get this wrong and you can end up with fuel wetting the port wall instead of atomising properly.

A retune is required any time you go up in injector size. Don't start the car and drive it on the old map. Book in with your tuner before the injectors go in, not after.

• Blouch turbochargers for WRX / STI
• KORSH parts for WRX / STI
• DIXCEL brake pads and rotors for WRX / STI
• Radium fuel system parts for WRX / STI
• Subaru WRX/STI fuel system upgrade guide

Will Injector Dynamics injectors fit my factory fuel rail?
Most EJ and FA applications work with the factory rail, but some sizes need an adapter top or a rail swap. Check the specific fitment notes on the product page or ask us before you buy.

Do I need to change my ECU to run these?
No, but you do need a tuner who can load the new injector data and adjust the fuel map. Haltech, Link, MoTeC and factory reflash platforms all handle this fine.

Do I need a retune after fitting bigger injectors?
Yes, every time. Injector size changes fuelling across the whole map, so the car needs to go back on the dyno before you drive it hard.

What size do I need for my power target?
It depends on your turbo, fuel type and boost level. Talk to us with your power target and fuel choice and we'll point you to the right set.

Does the BRZ need different injectors to the WRX or STI?
Yes. The FA20 in the BRZ is naturally aspirated from factory, so sizing is based on whatever turbo or supercharger kit is fitted, not a straight swap from an EJ combination. Tell us your kit and we'll match the injector to it.

Do these come with a warranty?
Yes, Injector Dynamics injectors carry manufacturer warranty when fitted and tuned correctly. Keep your tune log in case you need to make a claim.