Richmond Ring & Pinion Set - 5.83 Ratio, 35-6 Teeth, Ford 9" 1012-17 The vacuum/boost compensation ratio is

The vacuum/boost compensation ratio is 1:1

1980-1980 Pontiac Firebird

53 in Extended

7/16-14 in and 1/2-13 in Male Thread

Silver powder coat finish

Richmond Ring & Pinion Set - 5.83 Ratio, 35-6 Teeth, Ford 9" 1012-17 The vacuum/boost compensation ratio isRICHMOND 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.