ATP Harmonic Balancer - 102418 Part #: 102418 Line: ATP ATP Harmonic Balancer Limited Lifetime Warranty Material: Cast Iron Groove Count: 8 Hardware Included: No Belt Type: Serpentine Pulley Diameter (in): 8-3/8 Inch Pulley Diameter (mm): 212mm Degree Markings Included: No Number Of Bolt Holes: 4 Bore Type: Smooth Number of Integrated Pulleys: 1 Balancer Type: OE Replacement Balancer Style: Grooved New Keyway Included: No Inside Diameter Bore Size (in): 1-1/8 Inch Inside Diameter Bore Size (mm): 29mm Show More Show Less