Richmond Ring and Pinion - 3.73 Ratio - 30 Spline Pinion - 4 Series - Thin Gear - 8.875 in - GM 12-Bolt 12BC373 2070121 the renowned Super Starter series

the renowned Super Starter series

Oil Fill Plug

Made from 6061-T6 aluminum with an anodized finish and a replaceable 4130 steel pin

Complete Kit Includes: Windage Tray

Richmond Ring and Pinion - 3.73 Ratio - 30 Spline Pinion - 4 Series - Thin Gear - 8.875 in - GM 12-Bolt 12BC373 2070121 the renowned Super Starter seriesEXCel 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