Our XBK12 size 12 shaft mount reducer bushing kit with a 5-15/16" bore is meticulously crafted from high-quality steel alloys for exceptional durability and ease of installation. This size 12 bushing kit is compatible with major gearbox brands such as Dodge TXT1205, TXT1209, TXT1215, and TXT1225. The kit includes twin taper bushings, a robust full-length key, and premium hardware, providing everything needed for optimal performance of your size 12 shaft mount reducer. For additional information or to get a quote on our premium size 12 shaft mount gearbox bushing kit with a 5-15/16" bore, contact our customer service team and we will gladly assist you!