This is a set of two extra extra soft rear shock springs from Mugen. These springs are 86mm in length, and have 11 Turns.
- Mugen MBX6, MBX6E ECO, MBX6R, MBX6T
- Mugen MBX7R, MBX7R ECO, MBX7T, MBX7TE, MBX7TR, MBX7TR ECO
- Mugen MBX8, MBX8 ECO, MBX8T, MBX8TE