Works'91 TeamSpec Upper Deck Graphite Spacer (2.0mm) - YZ-003SG by Yokomo  [YZ-003SG]

Rear upper-deck graphite spacer

The YZ-003SG graphite spacer fits between the rear bulk and the upper deck on Works'91 TeamSpec chassis, concentrating stiffness at the rear to help dial in transient response and increase rear-end stability.

Fitting is simple: the part sits between the rear bulk and the upper deck stack and is held in place with the existing deck fasteners, so the overall chassis geometry remains unchanged. Because it modifies local rigidity rather than suspension geometry, you will notice changes in bite and response rather than ride height or suspension travel.

Install this spacer when you want a modest, reversible increase in rear stiffness for track tuning, such as cutting rear flex on high-grip surfaces or improving turn-in on tight corners.