Vibration dampers wear out with age as the rubber hardens and cracks. Old factory units can be rebuilt better than new with a lifetime warranty.

"(Harmonic balancers are) tuned to vibrate at a certain ideal frequency when new" to dampen crankshaft twisting caused by power strokes. For more on why the correct one for your crankshaft is important, see here.

Pricing is here.

If you don't see two dolphins, you need a vacation.