This Synchrotech GSR 1.90 Ratio Pro Series C/S 2nd Gear is a direct fitment for the 94-01 Integra B18C GSR and can also be installed with upgraded dual synchro in the 92-01 Integra LS for optimal performance. The 38-tooth C/S gear with a ratio of 1.90 delivers the power needed to maximize the Integra's driving potential.