Part #: 1700.48.11.WRX.4. These Injector Dynamics fuel injectors are a top - notch choice. They're a perfect fit for Subaru models like the WRX from 2002 to 2014, STI from 2007 to 2021, Forester XT (2007 - 2013), Legacy GT (2007 - 2012), and Outback (2007 - 2009). Injector Dynamics has set the global standard for tuners and car builders with these amazing fuel injectors. They're precisely matched in sets according to dynamic flow across the pulsewidth range, ensuring excellent cylinder - to - cylinder consistency, even at very low pulsewidths. You'll get dead - time compensation values for the full pressure and voltage range of the injectors. This helps your ECU compensations work right and keeps your air - fuel ratios steady when atmospheric or voltage conditions change. The kit comes with clips and pins for the Injector Dynamics injectors. You can either re - pin your factory harness or buy the optional plug - and - play adapters.

Using these Injector Dynamics fuel injectors is straightforward. First, make sure your vehicle model is one of the compatible ones, like the WRX from 2002 - 2014 or STI from 2007 - 2021. Then, install the injectors with the included clips and pins. You have the option to re - pin your factory harness or use the optional plug - and - play adapters. When it comes to using your car, the dead - time compensation values provided will help keep the air - fuel ratios stable, so you don't have to worry too much about atmospheric or voltage changes. As for maintenance, it's a good idea to have your injectors checked during regular vehicle servicing. Keep an eye on how your car performs. If you notice any changes in fuel efficiency or engine performance, it might be time to have the injectors inspected. Also, make sure to follow the manufacturer's guidelines for any specific cleaning or servicing requirements.