USA Standard Gear ZG GM11.5-373 Ring And Pinion SetRing and Pinion Kit Ring And Pinion Set Ring And Pinion Set; 3. 73 Ratio; 11. 5 in.; SPECIFICATIONS: Axle Type: GM 11. 5 in. Gear Ratio: 3. 73 Position: Rear WARNING CA Proposition 65: No FEATURES: High Performance Gear Set Uses Latest Designs And Manufacturing Technologies Provides Gear That Is Strong And Easy To Set Up Standard One Year Warranty USA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard