The race-proven Ross Performance Parts Ford Barra Harmonic Damper range is designed to protect your Barra from damaging torsional harmonics that are an inherent problem with long inline 6 cylinder engines. An incorrectly spec’d damper can lead to spun bearings, loosening of critical bolts, such as flywheel, flexplate or tail shaft, excessive vibration felt in the cabin or in the worst case a broken crankshaft.