Experience smoother shifting and increased durability with the Synchrotech Carbon Synchro Set K-Series 6 Speed (05-15). Designed for the RSX TSX ITR CTR Civic Si K20/K24/EP3/FN2/FD2, this set provides a 1-6 set fitting and single cone (1 piece) 5/6 synchros made of durable carbon material for lasting performance.