80003- Chevy Small Block 400 Harmonic Damper

Small Block Chevy 400 Harmonic Damper Harmonic Damper This damper is intended for use on externally balanced 383 or 400 small block Chevy engines. They feature a bolt-in counterweight which can be removed for neutral balance applications. These dampers are actually identical to the 80002 and 90002, except they also include the bolt-in counterweight. Both dampers have 60.