XClutch Stage 2 Single Sprung Ceramic Clutch Kit | Civic SiR 1.6L B16A (XKHN22003-1B)1989 1991 Honda Civic SiR 1. 6L B16A Stage 2 Single Sprung Ceramic Clutch Kit by XClutch XClutch Stage 2 ceramic upgrades have been designed for applications requiring a higher heat capacity over the single plate organic range. The stage 2 range includes both sprung cushioned ceramic and sprung ceramic friction disc options. The sprung cushioned friction disc options are recommended for applications requiring more pedal modulation such as high