Nostrum Upgraded Direct Injector Kit 2015-2021 WRX, 2014-2018 Forester XT
These injectors have been carefully developed to fit like factory and have no compatibility issues with a stock WRX FA20F engine, meaning there’s no need to worry about secondary injection controllers, fitting secondary injector hardware, filling meth tanks, or clogged meth injectors. Being that they are compatible with the stock ECU, they are fully tunable with Cobb or EcuTek.
While increasing flow rate is critical to making more horsepower, there are other factors to consider when choosing fuel system upgrades. A bigger injector isn’t always a better injector! It can flow a large volume of fuel at WOT, but if the spray pattern is poor, you can expect poor idle quality, poor drivability, increased knock propensity, soot, NVH (noise vibration harshness,) and tuning difficulty. Additionally, the wrong spray pattern can result in liquid fuel impinging in the cylinder walls, causing oil dilution, which increases mechanical wear to internal engine components.
Nostrum has invested significant time and resources into acquiring the equipment and machinery necessary to deliver an OEM level of quality on our injectors. Our engineers design and develop injectors to optimally interact with engine air flow inside the combustion chamber to improve fuel evaporation and create a homogenous air-fuel mixture that results in a higher combustion quality. For you, this means that you can expect our injectors to perform at their absolute best regardless of what you are asking from them, from daily driver duty to setting new ¼ mile records.
Features:
- WHP Potential on Gasoline: 620 WHP
- WHP Potential on E85: 460 WHP
- Tune requirement: Yes Recommended
- Tuning Suite: COBB
- Flow Rate Increase Over Stock: 10%
- Flow rate: 15.7 g/s at 100 bar
- Max Operating Pressure: 150bar / 15MPa / 2200psi
Contents:
- Set of 4 injectors, tested & batched set with serial number
- Installation instructions
- Tuning guide (Dealer & Certified Tuners only)
- 2015-2021 WRX FA20F (VA Chassis)
- 2014-2018 Forester XT FA20E [2.0L turbo FA20 engine]
Frequently Asked Questions:
Q: Is a tune required?
A: A tune is not required to start the vehicle, but to maintain drivability we recommend a tune after install.
Q: Are these injectors Ethanol compatible?
A: Yes, these injectors are fully ethanol compatible
Q: How are you able to offer upgraded injectors for a lower cost than oem injectors?
A: As the leader in high performance aftermarket DI fuel systems, Nostrum’s partnerships with OEM suppliers allow us to offer products that are competitive with Subaru dealer parts - without Subaru dealer markup.
Q: Can I use these injectors in my BRZ’s FA20A engine?
A: The FA20 found in the BRZ runs a completely different style of direct injector and are imcompatible with our upgraded WRX injectors.