Purchase this tune only if you have purchased a DOC Race Turbo kit. DOC Race has been working with the best BMW tuners in the world to bring you guaranteed satisfaction or your money back! Best of all if we damage your motor we will pay for the damages up to $10,000. Once you purchase this product you will get an email requesting information on your setup such as VIN#, mod list, and your hp goal. We will send you a base map so that you can start up your car after the turbo install and safely drive it home. We will then work with you to develop the perfect tune for your lifestyle. Our tuners have tuned record breaking cars across the world and now they can be a tool in your toolbox. Tunes are specifically designed for DOC Race turbo kits. No tune is too big or too small for us to do. If you have any tuning related questions please email tuning@docrace.com.