This lightweight upper mount bracket is machined from aluminum and supports a coil spring using a genuine upper mount. It is necessary for height adjustable dampers. It is recommended for those who are reluctant to install a pillow upper mount. This bracket allows you to use a genuine upper mount with the coil spring of a coilover damper. Use a coil spring with a diameter of 65φ.
It is introduced on Ameblo's "M&M HONDA's Honda Honki."
https://ameblo.jp/mandm-honda/entry-11657665432.html