This tune has been on my car for as long as I have owned it (2 years) and all the way back when the original owner owned it since 2005. Works fine just want to sell in order to go with an even bigger file. The ATP fueling kit includes the 550cc RC injectors which are also in good working order and the re-mapped ecu to accommodate more boost! Just plug and play with a bigger turbo and an intercooler! Let me know if you have any questions. Will only work on 2001 Audi a4 1.8t motors only. Asking $500 for tune AND injectors. Call or text 3 0 3 - 9 1 2 - 9 1 4 4. Thanks for looking.