Synchrotech MK-SYN101B Brass Master Kit (GSR ITR B16)

Fitting: Y80 S80 S4C S21 Y21 (B16A/B16B/B18C)
Included: 1-5 Brass Synchros, 1-5 synchro springs, brass reverse synchro and spring, 1-5 Slider Sleeves, 5 shaft bearings, 2 axle seals, input seal, shift rod seal, and a new dust boot.