Manual Transmission Tuned 2003-2005 Cavalier/Sunfire Ecotec ECU/ECM

A custom-tuned ECU/ECM for 2003-2005 Chevrolet Cavalier and Pontiac Sunfire with the Ecotec engine and manual transmission. SBR Performance supplies and tunes the ECU — you receive a plug-and-play unit calibrated specifically for your car and your power goals, backed by real dyno research. About the Tune Luke has spent countless hours on the dyno developing the calibration data behind these tunes. Fueling, ignition timing, and rev limiting are all dialed in to work with the stock Ecotec setup while leaving headroom for common bolt-on modifications. Whether you're building a street car or a track weapon, this is a proven starting point for your Cavalier or Sunfire. What's Included SBR Performance-supplied ECU/ECM, custom tuned for the 2003-2005 Ecotec manual transmission combination. Plug-and-play installation — no additional programming tools or dealer visits required. Before You Order Please list any engine modifications in the order comments at checkout — camshaft, head work, intake, forced induction, injectors, etc. The more we know about your build, the better we can calibrate for it. All orders are handled with complete confidentiality. Questions about camshaft options, fitment, or what tune is right for your build? Contact us before you order — we're always happy to talk through it.