This product is for people with our ZZP turbo kit which already comes with a ZZP tune using CBMs tuning interface. You must already have this to purchase this update. This is only for people that make changes to the setup and it requires a retune, for example, changing boost level, injector size, switching from E85 to gas and visa versa. Your ECM must be sent in for the file update. Contact Kyle@ZZPerformance.com for more details.