Richmond Ring & Pinion Set - 3.90 Ratio, 39-10 Teeth, GM 12 Bolt R07C09YS The Mid-Length Tube Header Design

The Mid-Length Tube Header Design Provides Significantly More Low and Mid-range Power than Cast Manifolds

Investment in people and dedicated in-house design and development facilities ensures that our customers have access to the most effective

018 in Thick

Provides Finest Fit

This alternator is interchangeable with GM # 10480326

Richmond Ring & Pinion Set - 3.90 Ratio, 39-10 Teeth, GM 12 Bolt R07C09YS The Mid-Length Tube Header DesignRICHMOND 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,