GM 10.5in. 14 Bolt 5.13 O.E.M. Ratio For Use With 4.56 And Up Carrier;Will Not Fit 4.10 Carrier;10 Year Warranty;Computer Heat Treated 8620 Steel;Manufactured To O.E. Specifications;Double Shot Peened;Double Lapped G2 Axle and Gear G2 GM 10.5 Inch 14 Bolt 5.13 O.E.M. Ratio Ring and Pinion - 1-2023-513 1-2023-513 Ring and Pinions