We also offer an additional external balance weight for use with our 200-1128 and 200-1158 dampers which allows them to replicate the balance of the factory Chrysler cast crank dampers. This weight normally comes supplied with the 200-1128 damper, but must be purchased separately with the 200-1158 damper. Use our 109-1571 bolt kit to attach this weight to the back of the damper.