The Synchrotech ITR B16A2 31T C/S 4th Gear is specifically designed for the 1994-2001 Acura Integra Type R (USDM). This gear features a Y80 S80, B16A2 S4C Y21 counter shaft construction which provides superior reliability and durability. This 31 tooth C/S 4th Gear is the ideal replacement for Type R applications.