Nitro gears are manufactured from 8620 steel gear forgings in the same manufacturing facilities as GM, Dodge, Ford and Toyota. They are precision machined using computer controlled processes, heat treated, CNC triple-lapped and Rockwell tested for hardness. These extra steps ensure excellent fitment, ideal contact pattern and smooth, quiet operation.
Tech Notes: These are a premium aftermarket gear set that is far superior than your stock 11.5 inch gear set.

These Nitro Gears are a true 11.8 inch diameter gear set and are a direct replacement for your 11.5 inch factory gear and also a direct replacement for 13-15 AAM 11.8 inch rear axle
Details:

• AAM 11.5/ AAM11.8
• 4.3 Nitro Ring and Pinion
• Differential:AAM 11.5 inch and AAM 11.8 inch, 14 Bolt
• Gear Ratio: 4.30
• Tooth Count: 41/10
• Pinion Splines: 30
• Ring Gear Bolts: 12 (not included)
• Warranty: 2 Years

Fits:

• 2003-2015 Dodge Ram 2500 w/ Cummins Diesel
• 2003-2015 Dodge Ram 3500 w/ Cummins Diesel
• 2003-2015 Chevy Silverado 2500HD w/ Duramax
• 2003-2015 Chevy Silverado 3500HD w/ Duramax
• 2003-2015 GMC Sierra 2500HD w/ Duramax
• 2003-2015 Chevy Silverado 2500HD w/ Vortec 8.1L Big Block
• 2003-2015 Chevy Silverado 3500HD w/ Vortec 8.1L Big Block
• 2001-2005 GMC Sierra 2500HD w/ Vortec 8.1L Big Block
• 2001-2005 GMC Sierra 3500HD w/ Vortec 8.1L Big Block

Tech Notes: These are a premium aftermarket gear set that is far superior than your stock 11.5 inch gear set. These Nitro Gears are a true 11.8 inch diameter gear set and are a direct replacement for your 11.5 inch factory gear and also a direct replacement for 13-15 AAM 11.8 inch rear axle