Richmond Ring & Pinion Set - 3.90 Ratio, 39-10 Teeth, GM 12 Bolt Headset Microphones 5"-12" deep

5"-12" deep

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Richmond Ring & Pinion Set - 3.90 Ratio, 39-10 Teeth, GM 12 Bolt Headset Microphones 5"-12" deepRICHMOND 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! GM 12 Bolt Installation Notes: When replacing a 2. 73 3. 90 ratio with a Richmond Hi Performance Ring & Pinion, the carrier must be replaced with a carrier from a stock 4. 10, 4. 56 or 4. 88 ratio. When installing 5. 14 to 6. 14 ring & pinion sets,