Our turn around time is typically 48 hours or less (during business days). You can simply bring us or send us your ECU and we reflash it to our custom specifications along with what your application may require. Please note if you have any questions or specific needs for us about ECU flashing, or any other product please call us T-F 9-6 PST Sat 9-5 PST) PLEASE FILL OUT AND ATTACH THIS DOCUMENT WITH YOUR ECU! EDR PERFORMANCE ECU Flashing service including return shipping!