In this video, the we focuse on bringing back the PREracing Carbon WRX, a high-performance Subaru WRX built for Time Attack and Hillclimb racing. The highlight of the video is the challenge of installing a Haltech Elite 2500 ECU (Engine Control Unit) in under an hour. The Haltech Elite 2500 is a premium, fully programmable ECU designed for racing applications, offering precise engine management and control. The video includes the step-by-step process of the installation, showing both the technical aspects and challenges involved. There is also a discussion about the WRX's performance upgrades and the importance of proper tuning for racing. We also provide insights into the car's modifications, how the new ECU integrates with the setup, and get ready to test the setup!