This listing is for a brand new 3.08 ring and pinion set. This item is brand new, top quality (not a blem). It is designed to fit GM 8.5 inch differentials. Also included is a pinion installation kit. Kit does not include carrier bearings or axle bearings. They are available for an additional fee. Please specify if this kit will be used in the front or rear of the vehicle when ordering. If you have any questions feel free to email me. Buy with confidence.