Tamiya Hotshot Modified Rear Shock Mounts. They are meant to allow for independent shocks at the rear end, replacing the useless cosmetic round heatsinks. You can use this as auxiliary suspension, or replace the original mono damper entirely.
upgradeparts-hotshot-rearshockmount
A shorter version (for use with longer dampers): upgradeparts-hotshot-rearshockmount-shorter
The configuration below goes one step further – it disables the original damper entirely (it remains in there only as a cosmetic item). A brace is added to keep things tight:
Variation 1:
upgradeparts-hotshot-rearshockmountv2
Variation 2:
upgradeparts-hotshot-rearshockmountv3
upgradeparts-hotshot-rearshockmountv4
This is a one-piece mount with brace:
upgradeparts-hotshot-rearshockmountbrace1
Another one:
