COBB Subaru Stage 1 + Redline Carbon Fiber Power Package - 2015-2021 Subaru WRX

The Accessport V3 is a tuning device that connects to the car's OBD-II port and allows for custom tuning of the engine's ECU (engine control unit). The Accessport V3 can store multiple custom maps and switch between them as needed, providing the ability to adjust various engine parameters such as boost pressure, ignition timing, and fuel delivery.

The Subaru Redline Carbon Fiber Intake System is an aftermarket air intake system that replaces the stock airbox and air filter. The intake system is designed to provide improved airflow to the engine, resulting in increased horsepower and torque. The carbon fiber construction of the intake system also provides weight savings and an aggressive appearance.

Combined, the Accessport V3 and Subaru Redline Carbon Fiber Intake System can provide a noticeable increase in engine performance for the WRX 2015-2021. However, it's important to note that aftermarket upgrades can potentially void a vehicle's warranty and may have an impact on the vehicle's emissions compliance.