High Performance Yukon Ring And Pinion Gear Set For GM IFS 7.2 Inch S10 And S15 In A 4.56 Ratio Yukon Gear & AxleYukon Ring and Pinion sets give you the confidence of knowing you are running gears designed for the harshest of conditions. Whether it is on the street, off road, or at the track, Yukon ring and pinion sets deliver unrivaled performance and quality. Yukon uses the latest designs and manufacturing technologies to provide a quiet running gear that is strong and easy to set up. Details: Fits GM 7. 2 inch front 7. 20 inch ring gear 27 spline pinion 10