B16A B18 88-91 3rd-4th Carbon Synchro Set Y1 S1
2 piece synchro set for 3rd, 4th gears. Synchros are Carbon Lined for ultimate performance. Fitting JDM Integra S1 (Integra XSI/RSI), USA 1990 Inegra B18 Cable S1, JDM 1989-1991 Civic/CRX SIR Y1 Cable. Set will fit only B Series Cable operated Transmissions with the case ID of "Y1" or "S1" If you have questions about proper application please contact us for assistance.