Shine Racing Services understand Audi and VW cars so well that they race them. I recently visited their shop for the first time to have an improved ECU installed in my Audi. I found everyone there to be very knowledgeable, professional and honest. Don't be misled by their name. Although they understand perfomance tuning very well, they are also a great shop to go to for general repair and service. Their rates are reasonable and their techs are knowledgable. The only downside (for me) is that they are a good 30 mins south of Boston.