Your spot on with the shock tower but the listing did say "Custom Rear Shock Tower Black F.R.P." but it isn’t on the packet so you are 100% correct - never seen the two bracket mount holes before thoughDual wrote:ZC-720S was originally the rear shock tower for the Yokomo Works '91 and then became the rear shock tower for the Works '92 and had in brackets on the card header "Custom Rear Shock Tower Black F.R.P." They both shared the same part number. BTW fakiee, the shock tower you have shown in the photo is the Works '91 Rear Shock Tower.
ZC-411 is a front anti-roll bar kit with servo saver bracket/support for the Yokomo YZ-870C and 1989 YZ10.

Intrigued by the anti roll/servo bracket - might come in handy for a hybrid/custom build
