The JR-TT2B05-GU set replaces the TT-02B's rear plastic arms with machined gun-metal aluminium components designed as an aftermarket upgrade. The alloy parts give a stiffer mounting point that improves repeatability when adjusting suspension settings.
As part of the rear link assembly the arms change roll centre behavior and rear track reaction, so they will alter how the car responds to shock and spring setup. Fit them when you want a firmer rear end for handling refinement or as a more durable option for regular running.
Installation advice: verify hole alignment and orientation before torquing fasteners, reuse original retainers when appropriate, and move the suspension through its travel to check for any binding. Regular inspections of bolts and contact surfaces help preserve setup accuracy.
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