A retune invoice is issued when there is a change in parts (such as injectors or a fuel pump), or after fixing mechanical issues that require us to restart our tuning process. This allows us to perform the necessary parts logging, adjustments, and fine-tuning.
Please note that we allow a 14-day grace period from the start of the tuning process. This two-week window is intended for driving logs and break-in periods, after which we circle back to review your logs and complete the fine-tuning.