You will need two keys «at 13».
1. Turn away nuts of bolts of fastening of a collar, take out bolts and remove a collar. Disconnect the muffler pipe from the resonator pipe by removing the O-ring.
2. Raise the muffler and remove the cushion from the muffler bracket.
3. Similarly disconnect pillows from two other arms and remove the muffler.
4. Install the muffler in the reverse order of removal.