TB-04 Touring Car Rear Suspension Arm TB4056 by GPM  [TB4056]

Rear aluminium suspension arm for TB-04 platform

This aluminium rear suspension arm replaces the stock plastic arm on TB-04 touring cars and is supplied as TB4056. It comes as 1pr and is aimed at builders who want a tougher arm for track use or to fine tune suspension feel.

Installation is simple: remove the original lower arm, check that the TB-04 mounting points and fasteners match, then fit the aluminium arm using the existing screws and ball studs where they fit. After fitting, cycle the suspension to ensure free movement and set wheel alignment.

From a setup view, the aluminium arm reduces local flex relative to plastic parts which can tighten rear response. Use it when you need consistent geometry under load or when dialling in traction; small adjustments to dampers and rear toe often compensate for the change.