SRT6 service manual section 8W
Oxygen Sensor 1/1 Upstream . . . . . . . . . 8W-30-7, 8
Oxygen Sensor 1/2 Downstream . . . . . . . . 8W-30-10
Oxygen Sensor 2/1 Upstream . . . . . . . . . 8W-30-7, 8
Oxygen Sensor 2/2 Downstream . . . . . . . . 8W-30-10
have fun.....