This Factory Pro accessory is a graphite chassis stiffener made for Tamiya M08 applications and labelled for 239 use, intended to alter chassis flex without changing suspension geometry.
Its role is purely tuning: by stiffening local sections it changes load transfer between the front and rear, which can sharpen turn-in and stabilise the car at speed for on-road racing. It is designed to mount to the existing M08 fixing points and to complement adjustments to shocks, anti-roll bars and tyre choice.
Installation is suitable for hobbyists comfortable with M08 maintenance; the stiffener fastens to the factory plate areas and typically replaces or supplements stock bracing. Check screw torque and alignment during fitting and inspect surrounding holes and bearings for wear when modifying chassis stiffness.
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