Yukon Ring & Pinion sets give you the confidence of knowing you�re running gears designed for the harshest of conditions. Whether it�s on the street, off-road, or at the track; Yukon ring & pinion sets deliver unrivaled performance & quality. This ring & pinion may cause noise in some applications. All Yukon ring & pinion sets come standard with a one-year warranty. This gear set uses 3/8" bolts. Some factory gears use 7/16" bolts. If your factory case uses 7/16" bolts you will need to purchase YSPBLT-027 spacers.