Damper Doctor is the source for new and rebuilt harmonic balancers. We stock thousands of dampers for domestic and import vehicles. If we do not have the right harmonic balancer in stock for your vehicle, we offer a custom rebuilding service of your worn out damper. Damper Doctor also offers rebuilding for drive shaft supports. We specialize in harmonic balancer and drive shaft support rebuilding for hot rod, classic, and vintage vehicles. With over 45 years of experience, you can feel confident that the job will be done right.