If you already have a tune from us and change some parts later on, we charge a $50 (plus shipping) fee to update the tune for your modifications. The first step is to call or email us to see if your changes require a reflash. Depending on what it is, it may or may not require additional computer tuning. You will need to send your PCM or chip back in for reflashing, we do not send one to you unless you make arrangements (i.e. contact us and purchase a core outright). When you send your PCM or chip back in, please include a note with your name on it, contact information, and what has changed since last time. Retunes are usually processed within 2-3 days. Reflashes are only honored for the original purchaser of the tuning.