It was the chennai-Bangalore special of 1998-timings co-incided exactly with kaveri that it got extended-return timings when Kaveri was introduced for 11:15 departure at chennai and 6:30 arrival at Bangalore and depart at 6:50 to mysore-after the 16731/32 got extended to mysore they change dthe timings of kaveri and 16731/32 started running on the kaveri slot between SBC and MYS