Richmond Ring & Pinion Set - GM 12 Bolt - 3.42 Ratio - 141-12 Teeth BR20023 our dual-plane design makes outstanding

our dual-plane design makes outstanding power from 1500 to 6500 rpm

Chevy A-Body / B-Body 1958-64

Power Valve Plug

Does not include backing washers which are not needed on SA2015 and newer helmets

Richmond Ring & Pinion Set - GM 12 Bolt - 3.42 Ratio - 141-12 Teeth BR20023 our dual-plane design makes outstandingRICHMOND is the leading manufacturer of professional quality, hi performance ring and pinion sets. For over 80 years, the Double Diamond has signified the highest quality gears in the racing industry! Richmond Gear is famed for their tough and reliable ring and pinion sets. That same level of reliability and precision is available in their other driveline products, including differentials, racing Transmissions, driveshaft components, and more.