Our XBK12 size 12 shaft mount reducer bushing kit with a 5-7/16" bore is engineered from top-grade steel alloys, ensuring long-lasting durability and straightforward installation. This size 12 kit fits universally with gearboxes such as Dodge TXT1205, TXT1209, TXT1215, and TXT1225. It comes with twin taper bushings, a strong full-length key, and high-quality hardware, offering a complete solution for 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 5-7/16" bore, contact our customer service team and we will gladly assist you!