Gm LS High Performance Harmonic Balancer w/ Balancer Bolt

• Fits most LS engines 
• Free up horsepower over stock dampers, 30% more efficient above 5,000 rpm
• CNC-machined and designed to mount to crank hub so timing marks never change position
• Includes New Harmonic Balancer Bolt 
• 6.325'' Overall Diameter
• Internally Balanced 
• Marked Timing degree marks