2.4L Bottom end hybrid- Manual Transmission, Tuned 2003-2005 Cavalier/Sunfire Ecotec ECU/ECM

This is a custom dyno-tuned ECU/ECM for the 2003-2005 Chevrolet Cavalier and Pontiac Sunfire with the 2.4L Ecotec engine and manual transmission, built specifically for the bottom-end hybrid configuration. About the Tune We supply the ECU and expertly tune it to maximize performance for your specific setup. Every tune is developed from hours of real dyno research and refined for the 2.4L Ecotec platform — giving you improved throttle response, optimized fuel delivery, and more power across the RPM range compared to the stock map. What's Included Your tuned ECU/ECM, ready to plug in and run. Before You Order When ordering, please leave a comment at checkout describing any engine modifications (cam, injectors, intake, exhaust, etc.) so we can tailor the tune to your exact build. All orders are completely confidential. This ECU is plug-and-play for the listed fitment. If you have questions about compatibility or want to discuss your build before ordering, use the Contact page to reach us directly.