Richmond Ring and Pinion - 3.73 Ratio - 30 Spline Pinion - 3 Series - 8.875 in - GM 12-Bolt 12BC373T H778C31 563 in Square Port

563 in Square Port

2-1/4 in Center Inlet

Incl 1/8 in

All visors mount with four specially machined aluminum fasteners and provide an air-tight seal with the rubber grommet on the helmet

Does not fit Quarter Stick 2 or Pistol Grip 2

Richmond Ring and Pinion - 3.73 Ratio - 30 Spline Pinion - 3 Series - 8.875 in - GM 12-Bolt 12BC373T H778C31 563 in Square PortEXCel drivetrain products are engineered to exceed OEM specifications by manufacturing to precise specifications in world class factories, using the latest heat treatment technology, with extensive quality controls throughout.; Richmond Gears EXCel drivetrain products offer high quality OEM replacement drivetrain products for your vehicle.; Richmond Gears EXCel line of ring and pinon gearsets provide Richmond quality at affordable prices.; All EXCel