I bought some wheels that other RS6 drivers are using but on my car they made a harmonic resonance type noise when braking. After Tyler and his techs troubleshot the issue by rotating and changing wheels with factory and other aftermarket wheels, they communicated with the maker and worked out a way to correct the situation. Anytime you mess with a vehicle out of the factory specs, you could run into issues, and Pacific German doesn't leave you hanging in the wind. It's a drive for me, but worth it to choose them as the only shop I choose to modify my RS6.