This Fluidampr friction washer is a 0.010-inch diamond-impregnated replacement part for 2001+ GM/Chevy 6.6L Duramax applications and is sold as a single piece. Fluidampr recommends replacing the washer whenever the damper is removed when using their Duramax High Strength Bolt Kit, making this item a service replacement for proper reinstallation.
Fluidampr 2001+ GM/Chevy 6.6L Duramax Harmonic Balancer Friction Washer - 1pc