Core Information

To purchase a rebuilt harmonic balancer, a refundable core charge is required. This core deposit is separate from the purchase price and will be refunded once we receive and verify your rebuildable core. Please ensure the returned core matches the purchased part in make, model, and engine size. It must be free of severe damage, except for worn or missing rubber. Include a copy of the original invoice and your contact information with the return. We recommend insuring high-value cores during shipping.

Send returns to:
Damper Doctor
1055 Parkview Ave.
Redding, CA 96001

We do not accept C.O.D. packages.